- The Misadventures of P.B Winterbottom
- Kane and Lynch 2
- Dead Rising 2
 - Age of Conan Expansion
- BlazBlue Calamity Trigger (not sure for which regions, but recall an announcement about it, plus there is a GameFAQs entry )  
 - Elemental War of Magic
  Those are the ones I remembered off the top of my head that weren't on your list. There are probably some more that I'm forgetting.

 Final Fantasy XIV command and conquer 4 "
 

A little update on the PC version of BlazBlue:
 
 http://www.rockpapershotgun.com/2010/04/16/story-of-the-blues-blazblue-to-come-to-pc/  
 
Coming June this year, with cross-platform multiplayer!
 
 From the article:

It’s also worth noting that it’ll be compatible with the 360 multiplayer, meaning that there’s a community of gamers for you to meet and be beaten up by in existence.

Nuclear Dawn? 
 
Also why hasn't Mount and Blade: Warband been added? Deus Ex 3? Natural Selection 2?  NS2, should be out this year. Maybe Homefront? It's still TBA though.
 
Remember kids, the PC doesn't have games.

 http://adrianwerner.wordpress.com/games-of-2010/
 
This MASSIVE list has pretty much every thing :)

It would be crazy to think Deus Ex 3 will be out this year.

Episodes from liberty city.