As I no longer own a 3DS I'll obviously be skipping these titles, as I did with the Ruby/Sapphire remakes. But based on what I played of X/Y, I'm not missing all that much. X/Y felt laughably simplistic and had so little difficulty to it. On my first playthrough I don't think I wiped out once, and I finished everything including the postgame stuff in less than 24 hours of game time.
It was fun to roleplay though, due to the character customisation. I made a girl called Malady, who dressed in dark, earthy colours, and used only pokémon with dark, bug, poison typings, or were themed after bats (because I love bats). Really fun to do and made the game marginally more difficult.
I feel that Game Freak are turning too far towards competitive play, though. Since my 3DS was offline for the most part (only connected if I sat right next to the router, which is uncomfortable) I didn't battle online. This meant that the metagaming they seem to promote via EV training and the like was a useless function to me, because nothing in the single-player game was hard enough to warrant spending that much time and effort to do.
Hopefully they rectify that with these new titles, but... I'm skeptical.