This would be my follow up question as well, except I would want at least a 60 inch screen.

I think it's much more likely to go the other direction (using a TV as a monitor if you happen to need a huge screen).

This got me curious and there are a couple of options, most from a brand called Sceptre that I haven't heard of. Here's one with 4k, 65" and no smart features: http://amzn.to/2kpcIqy