If tablets don't replace PCs, what will they do?

In my previous post I argued that tablets would not replace PCs. That position leads to an obvious question: If we keep PCs, then what will we do with tablets?

In the office, I can see tablets replacing laptops for some tasks. Instead of dragging a laptop to a meeting and fighting for power and network connections, people can easily carry tablets. The computational tasks at meetings are presentations, light note-taking, reading e-mail, and coordinating calendars. These tasks can be easily handled with tablets.

Some folks have floated the idea of eliminating the projector and displaying the presentation on attendee's tablets. (That could also help folks attending the meeting at remote locations.)

In the home, I can see tablets taking some of the tasks of PCs and laptops. The chief task: movies. I suspect music will be handled by phones, but movies need the larger screens of tablets.

Also in the home, games (at least the low-end games like "Angry Birds") will probably migrate to tablets, again because of the screen size. Books, magazines, and newspapers will be on tablets. Casual web browsing: shopping, news sites, photo management (but not heavy photo manipulation like Photoshop or GIMP).

Tablets will be less of a computing device and more of a personal assistant.

So maybe tablets do replace something. Maybe tablets replace not the PC but the PDA (the Personal Digital Assistant). Maybe tablets replace... the Palm Pilot.