I'm using CreateSpace to create a POD version of my book. I'd planned to do so anyway, just to have a copy, but one of my readers has indicated she'd like to buy, so...
I do concur that print is still the dominant format, BUT I think what a lot of people forget is how transient that print is. Even if I were picked up by Random House (which I don't want to be, but hypothetically) and printed out and slapped onto the shelves at B&N, those copies would stay up for... how long? A few weeks? A month, maybe? But then MY books would be down and room would be made for the newest latest thing. If I was really lucky, the mega-stores would keep one or two copies on the back shelves.
So while, sure, it would be pretty to walk into B&N and see a display of my book, it's just not a reliable business plan for me. Although I'm sure it would work well for less "niche" literature.