I'm usually taking my personal AspireOne on business trips. Our operations guy refuses to stock netbooks because they are "underpowered". And, at least once I had our contractor remark that it's impossible to work on such an underpowered machine - while it was happily rebuilding Linux kernel at that very moment.
The thing's so much lighter and compact than company laptops, it makes huge difference when you have to climb a 70m tower with it, or unfold it during 13-hour flight. And most typical tasks in personal computing are not resource-intensive at all.