There have been many citrix community posts and references to the Nirvana Device as being a Phone and a PC,

http://community.citrix.com/custom/ourSearch.action?searchQuery.system=ocb&searchQuery.areas=blog&searchQuery.queryString=nirvana&search.x=0&search.y=0&search=search

Well it looks like we are getting even closer to that being a more complete reality.
Microsoft has just submitted patents for the interface to transform your phone into a PC.
I have been waiting for such a device to help bridge the gap between my phone interface
and a more traditional computer interface, the monitor, keyboard, and mouse.
Not that this device is available today, but I think that when it is, the line between mobile computing
and PC computing is going to be even more blurred, but this is a good thing!

Source: http://www.unwiredview.com/2009/01/29/microsoft-patents-the-interface-to-transform-your-phone-into-a-pc/