A huge amount of people that starter around the time of yellow stopped playing pokemon years ago and may not even have a 3ds possibly not even a ds. The people that starter with gen 3 are at the age where they might be losing some interest, or at least really would be nostalgic for their first gen. Plus again to mention the fact that gen 1 was already remade and elements of yellow were in hgss.
You'll be surprised how many of the Pokemon fans are the people who have been there from the beginning! I once sat on a bus next to a man who looked like he was in his late 40's and when I glanced his direction I saw he was playing Pokemon. I am 20 myself and I have a few friends who are older than me and have a DS just for Pokemon. Some have bough the DS3D already in anticipation for X and Y ha ha. I don't even have a DS myself never-mind a 3D one. It's way to expensive for a broke student.
I don't go around asking kids if they play Pokemon but I am sure your comment about "A huge amount of people that starter around the time of yellow stopped playing pokemon years ago" is not true at all. Just have a look at this forum. I bet most users are probably above 19.
Anyway, saying yellow was remade is not saying much as that was 9 years ago. I am sure many Pokemon fans would love a new remake of Yellow.
Even young generation, since I doubt they would like to play Pokemon yellow as it's graphic is very old school.
A even greater Idea would be a game where all previous regions are in one game. But that's just far fetched for now
