There will certainly to both, but the primary difference at some point will be price. If an ultrabook is $1000, but an iPad 2 is $400, the iPad 2 represents a better value for those who only need the capabilities a tablet can deliver. It makes sense to go with the new PC form factor--the tablet.

If you want more evidence that tablets are the next evolution of PCs rather than a conquering hoard intent on crushing the PC market, just look at Apple and Microsoft. Both of the major desktop operating systems are being merged and transformed to adapt to the new mobile world--evolving to meet the needs of the latest PC form factor.

As the mobile and desktop operating systems for both Apple and Microsoft seem to converge and meld into one, the line gets blurry on the differences between the two in terms of experience, and it just comes down to picking the size and shape of PC that works best for you whether that is a desktop, ultrabook, or tablet.