Full Browser /Flash/ Sliver Light Support = ???? Millions Application in Tablet
Windows RT actually ahead of number of application as most applications on iOS/Android actually below bar from their full web counter part. Since Windows RT support Full Browser functionality, It is equivelent to many more time in App count than any competitor.
Windows 8 too big to ignore. Fact that they force people to learn Metro interface, once user know Metro Inteface, they will prefer Windows RT Tablet. Microsoft is still zillion pound gorilla when it come to computing. Don't think people are stupid enough to listen all those blogger/analyst. They will realize $500 hybrid tablet is much better deal than other cheaper tablet or so call premium tablet.
Also School who currently supporting IPAD will love Surface. Touch Typing without noise is perfect for schools and Microsoft is good at making deals.
And don't forget corporate world who will force user to use Microsoft technology as well.