The only way I can see any form cloud stuff working is if theres a good countrywide web infrastructure offering safe, secure and fast access. Thats not just any form of online-poser, but downloads or even just basic email.  

Which at present isn't avaliable, well certainly not in the UK, indeed having to travel regularly I find the choices are ..

Dongles. Overpriced, unreliable and with incredibly limited bandwith.

Hotspots - free ones are normally insecure. Even in safe places like hotels and business centres theres time limits or data caps. Some companies also have content restrictions when using their networks.

All of which assumes you can figure which out network is safe to login onto. At one northern airport I use, theres 7 hotspots all claimng to be the aiport!

Scrounging - asking a friend if you can use theirs, which as well as being anti-social might impact their bandwith.

Smartphones - OKISH for basic stuff like maps and email, but can be pricey and often slow on 3G.

BTFON - a service which allows customers of one phone company/ISP to logon quickly and safely. Service is reasonably fast and works well, but only if you use that company.

...Bascally there nothing thats totally 100% on tap and safe like it is at home.

Though if there is a good reliable infrastructure in place it can work....Like the situ here..
http://www.amateurphotographer.co.uk/news/Royal_wedding_photographers_Behind_the_scenes_news_307258.html
...having trialled one of those cards at another event, it's amazing tech. But only when theres a good network and then we're back to the 1st point.

Pinky - you left the lens cap of your mind on again.