[atomize]

My mid-range LG monitor has a built in KVM as well as PBP (picture by picture??) --- Whatever it stands for, I am able to split my 34 inch wide screen between my work Macbook and my personal computer (Linux) - I use an app that I've had forever called Synergy to share my mouse and keyboard between them seamlessly. You can even copy/paste across machines. I personally am hooked on my PBP widescreen+Synergy combo.

[bonton89]

I believe there are HDMI splitters on amazon that let you do this with any TV, although I'm not sure how great the quality of output is. I was looking at them once to see about doing split screen gaming with two different consoles.

[starkparker]

Yeah, PBP was a gamechanger. I got a Samsung with it without realizing and now use it almost exclusively.