Gaming on Windows 8?

Just a question, how's gaming going to work on Windows 8?

Developers have the option to make "Modern Games" or "Desktop Games".

Can "Modern Games" be those AAA titles that we are used to see on consoles or do they have to be "lighter" because they have to be compatible with WindowsRT that is going to run on less powerfull hardware?

Or are "Modern Games" going to be mainly casual games and the AAA titles will stay as "Desktop Games"?

For example, a game like the new Need for Speed Most Wanted, coming this year, do you think it is going to have a full "Desktop" version (with console-like visuals and physics) and a "Modern" version (an iPad port)?

Just tell me how do you think game developers are going to plan their stretegies for Windows 8.