The trouble with the 810 is, that it is both a die shrink and a new architecture. In Intel parlance, it is both a tick and a tock. Quite a big change, a level at which the likes of Intel shies away from. Next, note how the estimated release is 1H 2015. Well 6 months is a long long time. First week Jan and last week May - big difference. Ultimately, the no of bugs which can be bourne by the user, that is the question. Of course the promise of 20nm and better integration offers better battery life on paper, worth holding out for. But random heating up, when software is not bug free, will be a concern which negates the positives. 64 bit is a new architecture, which means bugs will be unforseen.