Check out this crazy concept cellphone system called Brix. It’s a phone with one side as a screen, with no bezel. You can ‘stack’ several of the things side by side to create a larger screen. It’s not clear to me if this is just a fun idea or if the intent is to actually manufacture the system.
More details at Yanko Design: Two Brix Are Better Than One
And at SciFi.Com: Brix modular cell phone can expand into a large-screen display