It's 360 vs PS 1,2,3 combined. Not the eco system. A quick google search denotes the latter is less then the former, but not by a lot, as I said. Yeah if you include the PSP the PS3 would be more, but they didn't do that.
A lot of VITA games come to PS4 now and are counted. Good for them.
Dafuq? I don't need to read every book on my kindle to say it has 2800 books on it (which it does). But FYI I currently have 225 games installed on my Xbox One, 103 on the ready to install list (ones I feel I have completed and won't come back to often) and around 80 more incompatible 360 games (about 110 are compatible) and i receive 48 games per year through my gold sub, a couple from E3 giveaways and listing errors and the odd F2P here and there.
I'm not much of a cheevo hunter and even if I was, that doesn't change the numbers.
3398 XBLIG
1223 disc games
719 Xbox Live Arcade games
500+ OG Xbox games
5840 or so games from one box.