I wonder if XY will have the same amount of "loot" as BW2 had. Funfest Missions, PokéStar Studios, Join Avenue... you get TONS of stuff for free in these games. That includes several items you don't need many of, such as Magmarizers and Up-grades (and Hard Stones...). I've got a feeling that even if TMs had been single-use still, we wouldn't have much of a shortage of them with all the handing out. The flow of money has been greatly increased as well, with both money sinks and money sources blooming everywhere.
Anyway, the competitive effect of this is that it becomes easier and easier to get those "perfect" 'mons previously "exclusive" to simulators. EV training is easier, levelling can be done a lot faster, and you can get awesome moves on your Pokémon easier than ever before (For instance, I never really got around to use TM26 in my Gen. I-IV games. I kept thinking I'd sooner or later come across a Pokémon that really could use Earthquake to its fullest potential. I never did).
Also, the last time Smogon closed the XY speculation/discussion thread, GameFreak announced a new Pokémon within hours. The current attempt to replicate the success has so far been fruitless.
(Knowing my luck, we'll see news in a day or two. Or rather, you will. I'll be up in the mountains for a week without Internet, so any revelations will probably be discussed to death by the time I return).