I’m web surfing at this very moment on my Android 4g Razr plugged into a 10.1” screen Lapdock 100, which has a notebook sized keyboard and a finger mouse pad. Very nice, I rarely need to fire up the desktop PC anymore. My phone still functions as a phone when plugged into the lapdock, which has dual speakers...nothing great as speakers go but nice nonetheless. The lapdock has its own chargeable battery which also charges your phone as you use it.
Oh, and there is no tethering charges or any sort of monthly fee to use your phone in the Lapdock. The speed of the 4g Razr is incredible so there’s no waiting when web surfing or playing youtubes, etc. All good, no meaningful downside that I’ve experienced after a couple of months using the Razr and the Lapdock as my PC. Now, for heavy Word or Excel docs I still would use my desktop PC, but really I do next to nothing at home that requires the higher end Office software. I’m still learning the Quickoffice s/w that comes on the Razr.