Don't you think that a faster processor with 10,000 cores would only need 10,000 times more power? Yes single core processor, 1 GHz but doesn't that satisfy the needs that you would have?

Would it not be worth having a phone run the day rather than carry around a phone that's blazingly fast... only out of power all the time

It's fast enough. With the right operating system. the right UI, has the right hardware. Just needs polishing. But it is pretty neat already