I think he means getting a small computer and putting an lcd on it, so it's similar to a laptop. Would be cool if you could mod a battery on it too. Are you gonna use this as a sort of laptop? or just something easy to carry around?
Heres the kind of case i think your looking for
You might wanna find one without a handle. Whats your budget as far as parts go?
This might work even better, it's 17 inches so you ccould mount a 17" flat panel pretty well.