This looks cute.
Honestly, if I had been told that this was going to be Gen 8, I would have been disappointed. However, the news that another core RPG title is coming out next year means I have to view this one in a completely different light. Now that I know it's its own thing, I'm perfectly okay with it.
I have questions that I'm sure will be answered in due time (mainly, how will removing wild Pokemon battles effect the balance of the game in terms of levelling? Will there be more trainer battles/more exp given in trainer battles? And so on.). Beyond that, I like the look of it. What really catches my eye is having Pokemon follow you again, this time with fully 3D models instead of sprites, on top of having a fully customisable Pikachu or Eevee out with you all the time. Also, riding on an Onix looks super cool. I think this will breath new life into the overworld and make the region feel that little bit more alive. It's building off what they did in Sun and Moon, only now the Switch's power allows them to have more going on at any one time.
The only thing that disappoints me right now is the removal of random encounters. The random element always added an extra bit of charm because you were never sure what could pop up. I hope this is something unique to this game (as something heavily inspire by Go) and not a new trend that'll be continued in Gen 8.