Files will get larger, and take up more space, and also take longer to process.
As far as files getting larger, they shouldn't change by that much. How much of a difference are we talking about ?
Sure hard drives are getting bigger, just think of how much you'll lose as well.
I'm not buying into the more Mp the better image, at least not for now. We don't need more MP we need better quality ones.Make better use of what we have instaed of adding on.
Eventually newer technology will take care of this, with better sensors, but for now everyone does the keeping up with more is better.
Besides unless your printing large size prints, I think a lot of us need to ask ourselves If we really need those gigantic file sizes. I know I don't.