I don't think many people give games a fair chance before they form opinions about them ... Soon after a game is announced, long before any real information is released, they have decided to hype or bash a game and no ammount of reasoning will get them to look at it from another angle.
I don't think companies like EA or Capcom would start a project for any platform without expecting to produce a good (or better) game. Now, this doesn't mean that they don't produce bad games but it is typically that unforeseen problems arise and further development can not be justified. I could be wrong but I suspect that these companies were fully aware of how much processing power the Wii had before they started on projects like Dead Space and Dead Rising, and they probably had a plan to make a decent game within the limitations.
Obviously, these games will not be the same games that you played on the XBox 360 but that doesn't mean that they couldn't be good games ...
(Note: I'm not saying these games are good but dismissing them with limited information because one of the games doesn't have as many zombies on screen as an XBox 360 game is not particularly fair. )
