Kevin at JKonTheRun has replied to The Inquirer article that I mentioned Yesterday here.
The major problem is that the technology was not ready yet to deliver exactly the concept pictured by Microsoft. This is why the press has been given these bad reviews. It's true that they are heavy and that they have a battery life that is far from be considered the best for mobility, but I think that if Microsoft would not pushed to have this first generation as is at this moment we would not see coming generation with better technology. They had to prove that this concept has a market and so far it seems to me that sales are showing that, even with all this bad press. I have been reading news about new plans for new UMPCs and that's a good sign.
To me it's clear that UMPCs will have a long life and a place in the market.