As a very "casual" Pokémon player (I only own HeartGold and haven't even entirely finished it), I don't see any reason to take interest in the new installments. Sure, there are changes with each generation and a bunch of different pocket monsters to catch, but if you've played one Pokémon game, you know the whole Pokémon formula and it just isn't fun or intriguing enough to warrant purchasing again and again for me (or even just one more "again," as my game library shows). However, X and Y looks like it'll be making quite a number of improvements/additions to shake the series up a little, so if I owned a 3DS, I would have checked it out after a little price drop. The new 'mon look pretty cool and getting to ride one around would be neat. And of course there's the whole doing-3D-for-the-first-time and having full animations during battles thing; I'd say that's kind of a big deal for the franchise.
So in my (not-very-educated, mind you) opinion, X and Y is the first really justifiable Pokémon sequel since..maybe ever. 'Course I sure as hell am not going to buy a 3DS for it and if you've been playing that many Pokémon games and for that long, I sure can imagine you're downright sick of them. Because let's be honest here; it's still Pokémon no matter how many changes Gamefreak makes. You're either into that or you aren't and it sounds like you simply aren't anymore, OP.
So in my (not-very-educated, mind you) opinion, X and Y is the first really justifiable Pokémon sequel since..maybe ever. 'Course I sure as hell am not going to buy a 3DS for it and if you've been playing that many Pokémon games and for that long, I sure can imagine you're downright sick of them. Because let's be honest here; it's still Pokémon no matter how many changes Gamefreak makes. You're either into that or you aren't and it sounds like you simply aren't anymore, OP.