Is it a good idea to use a 32" 1080p TV as a monitor?

I'm buying a new PC, it won't be my main PC but will reside on the desk in my bedroom. I'd like to use a 32" LCD 1080p TV as it's monitor because it could double as a decent tv when i'm in bed. Has anyone done this? What are the drawbacks to using one 32" as opposed to a dual monitor set up with 2 19-20" screens?