Good news for XP users that don't want to switch to Vista to play those 2 games, Falling Leaf Systems offers a free compatibility libraries (once completed, scheduled for late July) to people that pre-order either of those games on Amazon. This library will allow those users to run those 2 Windows Vista based games on Windows XP.
Links:
http://www.prleap.com/pr/77567/
http://www.fallingleafsystems.com/preorder/
Links:
http://www.prleap.com/pr/77567/
http://www.fallingleafsystems.com/preorder/