I really can't imagine virtualised desktops getting anywhere in my own environment - the enormous extra server cost to buy hardware hefty enough to run a load of desktop apps alone would rule it out immediately, even if all our remote users had enough bandwidth to use remote desktops comfortably (they don't) and our VPN system could handle the traffic (it would catch fire trying). Not all my users are in this country, and a fair proportion are at least sometimes online via mobile broadband with traffic caps or metering ... I suspect the three figure bill one user racked up over the weekend was from a remote desktop session, I really don't want to see that become more frequent! Not to mention usage on planes, from places which have no 3g signal or indeed no mobile coverage...
indeed, the VPN itself is pretty much a non-starter since it's too intrusive (on Windows, Cisco's braindead attempt at a client just gets in the way) although it's tolerable on Mac OS X.
GoToMyPC has gained some traction, though - remote users can just continue to use their own familiar system - and we're very happy with Dropbox: better performance at a lower price than the geriatric Novell stuff, and much better restoration facilities: we can actually get a file back from a given point in time, within minutes, without paying extra, rather than paying £10 to wait a few days for the relevant file to be retrieved from the twice-weekly tape dump.
Dropbox gives us gigabytes of space, with seamless offline access, frequent backups, near-instant restores and the performance of local storage.