I am going to wait a while before even thinking about a surface tablet. Perhaps the PC based ones will be more interesting but RT based one seems awful limited at introduction. Essentially no apps or third party support for quite a while...
The question is will it be an iPad or a TouchPad (i.e. major success or discontinued) or somewhere in between. Amazon demonstrated that content is king.
Looks like it's doing well but waiting on the Pro version which comes out next month..
http://www.neowin.net/news/499-32-gb-surface-sells-out-backordered-for-three-weeks
When asked about the size relating to the Windows RT install, Ricardo Lopez replied, “After the OS, Office RT and a bunch of apps, you will still have more that 20GB. As you say, you can always add an SD card and while you cannot add apps there, you can get music, movies and photos there.”
Comparatively, iOS on the iPad takes up 1GB.