Sure, right now. But I've stopped lugging my laptop around when visiting friends or offices, because on the browser I have gmail, text editors, gdocs, ssh terminals .. almost everything I do outside of media editing I can do anywhere as long as I have my access credentials with me (thanks dropbox) and the internet. I think there'll be a place for a long time for dedicated professional machines - just like there's a place for dedicated servers but many services run great on a VPS. While we'll carry laptops/netbooks with us for some time to come I won't be surprised the day my kids come home with something that doesn't require ownership of their very own hardware, just some kind of authorization module.

I'm sure many of us have been in the position before when an emergency comes up and you ssh in remotely. All I really need to work is a smartphone, screen and input device and I'm comfortably working anywhere.