Marco Arment's iPad success story

I've never seriously considered getting an iPad. However, Marco Arment's tale of how he used one to help his mom with a home renovation project might have cracked the door open just a bit.

I’ve had laptops and cellular internet connectivity for 7 years, but I never would have done something like this before. Why?

His list of answers is a compelling set of considerations. I had thought about a few of them in isolation, but the sum total is more attractive than I realized.