How many people do you personally know who's computer use is all on a tablet and don't use a PC anymore?

It's hard for me to see someone who grew up around computers switching to today's tablets. Producing anything (even a simple email) is radically faster on a computer. Consumption is even faster on a computer (key bindings, indirect input that doesn't block the screen) and more comfortable, at least while sitting down (head positioning). For the old market it seems like they could benefit from something like a chrome book just as well -- a really dumbed down computer where you don't need to install things, have windows, or anything us hackers tend to expect computers to do.

Speaking from personal experience. I use my Macbook Air at work and to do heavy duty document writing/coding, and my Macbook Pro for recording music and photo post processing.

At home or on the move, when I don't need to be VPNed in, a lot of time is spent on the iPad for browsing, magazine/news reading, email, document reading, etc (admittedly I read books more on the Kindle). It's the form factor and easy touch experience that I really like.

I know at least one couple personally that has said they don't use their laptop anymore.

More than one third of US households have more than one PC. It’s probably a good assumption that most US households with iPads will keep at least one PC, but it’s very possible that many households are replacing their second or third PCs with iPads. After getting an iPad many households might not replace their kitchen or living room PC once it breaks. Maybe kids will get an iPad instead of a cheap laptop.

It would actually be very interesting to look at that question more closely. I’m not sure whether there is already data out there.

I think it’s important to emphasize that for the iPad to supplant PCs, people don’t have to ditch every PC they own. Many own more than one.

While such conjecture is hardly novel, I think it's fairer to say that iPads are replacing a lot of things, and that's what feeds the justification. Your PVR, TV, newspaper and magazine subscriptions, kids toys, educational products, and on and on -- iPad (or tablet in general, though obviously the iPad is the front-runner).

Its interesting that successful digital magazines are like 'print' and not like 'web'. I enjoy the Economist and WSJ and NYT etc when they just have print, pictures, and perhaps a short video snippet.

Unsuccessful magazines to date either try to animate / annoy with ads and/or charge more (or extra) for digital content.

The learning process is painful but I recently checked out the Endgadget's 'distro' magazine and its actually quite readable and useful so there are 'new media' folks arriving, 'old media' folks figuring it out, and people who aren't adapting I expect will die.

Now if we could bring back BYTE magazine in this form it would totally rock.