Oh of course!
We'll be getting Gen 9 either next year or in 2023. I'm hoping the latter.
However, I think Nintendo might end up extending the Switch's lifespan. I don't think 10 years will be enough. It might end up getting 12-15. At the very least, we'll see a slightly upgraded variant of the Nintendo Switch, that while not an official next-gen console, will be treated as one.
I mean, it's theoretically possible that a New 3DS situation could introduce stronger hardware that has exclusive titles, and I would like to see more of an Apple model where they gradually improve the hardware over time and phase out the older models so I can upgrade at my convenience. But I don't think Nintendo's ready to take that step yet. The Apple model would be very confusing for casual players trying to determine if their model can play the game they want, and Nintendo needs to come up with a clear way to communicate that for this model to work with consoles. That's most likely the reason why they've largely shied away from giving upgrades like the DSi and New 3DS exclusive games and primarily made them optional performance boosts for games that already existed on the base DS and 3DS models.
I think what Nintendo really means by the "10 years of Switch" comment is either (or could be some combination of):
1. The Switch brand will continue for 10 years, but not necessarily the Switch console generation. Similarly to how the Game Boy brand continued with the GBC and GBA, the DS brand continued with the 3DS, and the Wii brand continued with the Wii U
2. The Switch will stay on the market for 10 years, but the successor will be introduced during the last few years of that and there will be a cross-gen period of about 2-3 years similar to how the 3DS stuck around for the first few years of the Switch's lifespan or what Xbox and Playstation did with both the PS3/360 -> PS4/XBO transition and what they're now doing with the PS4/XBO -> PS5/XBSX transition.
3. They're giving a rough estimate with 10 years and it could go slightly under that with 8 or 9 years.
Whatever the case I do not see the Switch console generation lasting 10 years. No other console generation has because hardware doesn't stay that relevant for that long and segmenting it with upgrades confuses people and divides the player base which would ruin the whole point of choosing console over PC and mobile (which is to simplify your choice of hardware by having hardware out of the box that you know will run certain games). Until someone figures out an easy way to convey which models will run a certain game without tying it to a set console generation, set console generations will be here to stay, and that means Nintendo will be forced to start from square one some time before 2027 because there's no way in hell gamers will continue to tolerate the specs of the base 2017 Switch for that long.
Much more like the New 3DS.
While it wasn't a next-gen console, it was different enough to garner exclusive titles. To be honest - and I have said this many times since 2017 - console gaming won't get any better than the Switch. It is literally a portable home console. The only thing Nintendo need do is up the graphics (by a lot) and improve the joycon hardware. There is no going back from this, and I guarantee you, Sony and Microsoft are thinking of ways to follow up the Nintendo Switch right now!
We've reached the peak of console gaming. After that it's just VR.
I'm not quite convinced of this either. I see one crucial flaw in the Switch right now and I'm not even sure the technology is there to fix it yet, and that's that it's not the greatest at replicating dual screen gameplay like what we saw on the DS, 3DS, and Wii U. It comes close, but it's not quite there yet. And I think the best way to fix that would be with detachable screens that could communicate with each other wirelessly (that way you have the flexibility to either have a dual screen handheld or a Gamepad-esque setup with one screen docked and one screen attached to your controller), which could also have an added benefit of allowing two players to not only have their own Joycon, but their own screen as well. It probably won't work yet because the two screens would need to be able to communicate with each other without lag and without being ridiculously expensive, but if they could pull that off, that is exactly what I would like to see out of the Switch's successor. Otherwise we might have to wait a bit before we see the true peak of console gaming.
Nintendo might also come up with something we're not even expecting that could also enhance console gaming in some way beyond just graphics. Never underestimate Nintendo's ability to innovate and zag in ways that no one else thought possible when everyone else thinks they're going to zig.