The thing is that you will have a choice. I'll be able to get a 17" hex core, dual HD power machine while my wife/kids can have a arm powered tablet. Both machines will be able to run the same metro apps.
Personally, I like power tablets. I got an android instead of an iPad (I gave away my iPad) because of the added functionality (usb in, hdni out). If I could have a windows tablet instead, I'd be a very happy camper.