Thing is. Win 8 including the Metro interface wouldn't be such a bad thing on a tablet.
Exactly. MS was trying to do something which imo really didn't have to be done. I don't see the future of computing in totally mobile devices which depend on a Cloud.
I believe that system is as vulnerable as a totally 'fixed one', only that the consequences of that are more disastrous because of a single, simple reason (which was why the initial wave of personal computing was so successful).
The reason is that you no longer 'own' the apps you use to make managing your life easier. You will require the cloud to process data, simply because the mobile devices lack the 'size'/power and most fundamentally the 'juice' to run for significant amounts of time. Also, you will no longer "own" your data and programs. You will need Internet access in order to have your data available to you.
Add to that a lack of good input devices: MS has a foldable keyboard and tiny mice to input data for the "Surface". The touch surfaces of these devices yield a paradox: To be mobile the have to be small, but the human hand has not shrunk and it it not comfortable to use these devices.
The push to the Cloud is financial. You will have to pay to use the apps, and for the storage. It's all about money and the power of who has the data. If it's breached, who cares? What's your recourse?
Is your data more secure in the Cloud? Is the Cloud more secure than a hard disk and sensible precautions you can take? I think not. I do not wish to surrender control to Cloud personnel because their record is so poor. Also, it's a lot easier to concert an attack on a single target than hundreds of millions.
So... MS needs to be less lazy and offer different OS's to different markets. Car makers do it all the time, so get over it Mr. Ballmer.