The Pokemon Game Show is currently live in Japan where visitors can try out a demo of X/Y.
It's kind of late so I will come back and go into more details but here's the low-down.
Pictures are being continually uploaded here:
http://img.ly/images/raim2005?page=1Details so far:
-You can ride on Skiddo (Gogoat's pre-evo)
-Mega evolutions are initiated by touching a separate button in combat (on the same screen as the 4 other battle buttons)
-Fennekin used the move Psybeam
-The male rival looks to be a nasty rival instead of a nice guy
-Running is default with the analog stick, you hold B to walk.
-There are 3 stats in Pokemon-amie: Play/Friendliness/Hunger
Also, Pokemon Origins has been announced - an anime that will run alongside X/Y based on the Pokemon Adventures setting and follow Red in Pallet town as he battles his rival Green and challenges gym leader Brock. The PKMN.NET thread for this is
here!EDIT: I can't confirm for true just yet but it looks like there is a new type logo in the TCG which could well represent Fairy type. I know it's not quite X/Y related but still.