a lot of those games are Japanese games, that have normally been exclusive to Playstation... just look at the amount of Japanese games the PS3 has versus the 360, (heck the PS3 is still getting Japanese games including some of the ones you mentioned on the list).
Japanese developers tend to skip the Xbox version because it simply isnt worth it sometimes with the game selling really poorly (see D4 for the X1) or Blazblue Chronophantasma, the third entry of a game that used to be multiplat and became PS3 exclusive because the low sales on the 360 didn't justify the port, so its understandable that this developers that are not filled in cash want to avoid a version that could sell so low that it wouldn't make up the money of porting the game.
Disgaea has been exclusive to Playstation since the first game on the PS2 only a visual novel landed on a DS or some nintendo handheld outside from that they have been so close to Sony that they could just be counted as a 1st party studio at this point.
USF4 is being ported by SONY not Capcom, sony was the one that paid the port of the game and is porting the game to PS4, it wasnt Capcom wanting to take the game to next gen and avoiding the X1, or Sony buying exclusive rights, its simply that Sony paid for the port and MSFT hasnt paid for any port of the game.
