I agree, the "powerful tablet" seems like a genre without a market. iPad style tables are attractive because they are extremely small, light, and have excellent battery life. Why would I buy a larger, heavier tablet with poor battery life when I can buy a similar laptop instead?
The iPad is popular largely because it's something completely different from what's already there. A big tablet with an i5 and three hours of battery life is pretty much the same as what already exists in the PC space.
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.
I don't mean power tablets in terms of functionality, but rather in terms of raw computing power. Your Android tablet has nice features but it's still an efficient ARM processor which would be completely destroyed in any benchmark by a decent laptop. The question is, would you buy a power-hungry hex core tablet if one were available, rather than an ARM tablet or a powerful laptop? More pertinently, would enough people buy one to make it a viable market?
The iPad is popular largely because it's something completely different from what's already there. A big tablet with an i5 and three hours of battery life is pretty much the same as what already exists in the PC space.