Just starting to access their bank accounts, online credit card statements. The reason people screwed around for fun is that play is extremely important for innovation. Turns into useful stuff. The next step is wireless Internet. This represents to me the single most important change ever.
Computers are fine.
The Internet made them more useful. But we're still tethered to physical cables. When you can you add access anywhere anytime there are going to be so many profound changes I can't even comprehend. Oh, give it a shot. We're not going to think of them as computers anymore.