To be honest I'm amazed that anyone can be bothered carrying laptops or even netbooks about. To me they're good because you can move them easily from desk to desk, but the prospect of using a laptop 'out and about' and carrying it all day is singularly unappealing.
The iPad is actually heavier than my subnotebook from 4 years ago, and I suppose also heavier than most present day netbooks. It's also heavier than a MB Air.
I sometimes carry my notebook along when traveling. Not so much for just going to work at a cafe, but that might be because there are no really nice cafes around where I live.
Are you sure about those weights? I thought the iPad weighed 1.5 pounds, which is surely lighter than a MB Air and judging by a quick Google search lighter than the lightest netbooks ("just under 2 pounds").
