Will I be able to upgrade from Windows XP to Windows 7 when it comes out?

[LW07]

Topic. Or will i have to buy the full version?

 

[postmortemIA]

you might be able to use your xp disc for update purposes, but if you go with 64-bit version you won't be able to install it via update.

 

[BD2003]

As I understand it, at this point, 64-bit or not, you cant do an in-place upgrade from XP to 7, only a clean install. I assume you wont have an issue using an upgrade version to do it though.