Nervous, no, but that's because I'm not an early adopter. As much as Mr. Jobs wants me to believe that the web looks fantastic on an 8" screen, I often find myself wanting a bit more space on a 13" screen and viewing the web on my do-nothing-well netbook can be downright frustrating. Don't get me wrong the 13" macbook is just about the perfect laptop-sized laptop and the netbook was absolutely what vacation called for but for day to day usage color me very skeptical.
The idea of cutting that viewable space down as much as an Ipad will is something that I'll have to see in person before believing. I also think that in this "quicker, better, faster" world it's likely that something like this will at least grow a little be in later generations. It's already not pocked sized so another inch or two on the diagonal doesn't seem like a big deal to me.