Hmm, the specs I believe were released back in Feb. I'm sure if you did some digging you could find them. Not sure about the backwards compatibility, but seeing the current trend, I doubt it. For the moment I don't mind snaging a non-BC PS3 'cause I still have a functioning PS2.
But yes, we've been waiting for too long wading through the waifu crap that was XIII and XIII-2. Sure the games were pretty and the battle system was somewhat good, but it wasn't worth the time nor the money to play that game. Stale story and gameplay put me off. Not to mention a lack of open world and free exploration that I grew to love over the years with the other FF games (excluding XI and XIV). As for KH 3. I'll need to see more. The second dropped the ball for me and all the subesquent fillers were just not up to par with the first one. Graphics wise did see what I liked from the teaser (might hunt for a trailer if there is one), but I need to see gameplay. I'm somewhat surprised, but not surprised that no one is mentioning the new Metal Gear Solid game; The Phantom Pain or Transistor, which comes from the same developers as Basation.
I don't really care if it's exclusive to one console or another. If it grows the fan-base then that's great. More people to converse with about the game. I really don't see it as a detrement to SE. Though they are their own worst enemies when it comes to certain things, lol.