I'm with Pallentx on this.
It's not so much the hardware as the software that will be critical.
My only worry is the emphasis on win7.
Apple's success comes through what it chooses to leave out and what it choses to concentrate on to achieve the best user experience.
Microsoft's approach is to give as many options as possible.
Since everything is a compromise between cost, usage, convenience etc., I suspect the latter approach will be reflected in the cost.
One thing I have enjoyed about the iPad has been it's lack of multitasking. I like to concentrate on what I'm doing without distraction and any background tasks can be done on another machine.