Wow. I can't remember the last time anybody did as poor a job as Microsoft did on this feature.

In MacOSX the entire screen zooms in and you get a magnified view that I don't think could be any better.

Windows 7 opens up a new fixed size window that can be used for very little else than reading text. Major fail.

To be fair though, the the window does have two different fixed sizes... whatever good that will do.

I'm running Windows 7, and it zooms the full screen just as you describe on the Mac. When you press the "Windows" key and press "+" you'll see a magnifying glass on the screen, click this and you'll get a floating toolbar. In the toolbar you'll see a 'Views' drop down list simply select 'Full Screen'.