Yes, Pokemon X & Y looks excellent, visually. But even so, looking at the photoshop handiwork of Justin—Bieber, it's hard not to fantasize about an entire Pokemon game in this particular style, with backgrounds like these.
I mean, it's gorgeous! So much detail. Take a look:
Granted, we don't have to leave the sprites to the imagination (or wait until X & Y's release)—artist Noscium has cooked up a number of awesome Mega Evolution sprites already, along with sprites of the new Pokemon in X & Y. Check em out:
I like to put Pokémon sprites on Pixel backgrounds [Justin—Bieber]