I'm inclined to say that mirrorless is definitely the way forward.

I've not used one so can't really comment properly, but I'd certainly like to try one, and if I were to go for a new camera setup, I'd probably go mirrorless.

I find the viewfinders in modern SLRs to be pretty rubbish. Most are small, and don't have proper focusing aids like you'd get on an old-fashioned SLR. There's also the issue of eyesight. I don't have particularly good eyesight, which makes using the viewfinder even worse.

I expect that if electronic viewfinders are big, high resolution, and quick to update, they'd be good. Its not uncommon that I use Live view on my EOS 500D for focus-critical shots.

As for eye controlled focussing, it will be interesting to see how that works out. A couple of years ago, I got a Canon EOS 30 (film camera), from about 2001, which has eye controlled focussing. Apparently some people really loved this feature at the time, and were surprised that Canon didn't bring it over to their DSLRs. I've tried to use it, but it doesn't work with me wearing my glasses, so its pretty much useless to me. It kind of worked without the glasses, but I couldn't see properly anyway. I think opinions on this kind of feature will vary depending on the individual user.

Although I say mirrorless is probably the future, I doubt DSLRs are going away quickly. Many people will already have a good investment in SLR cameras, and more importantly, SLR lenses, and may not wish to change systems.

I can't comment on cell phone cameras having never really used one. From seeing other people's though, I can say they are a damn sight better than they were ten years ago.