I don't own a Tesla, but I've driven them, and I'd echo this sentiment. The screen really is huge, and the UI works surprisingly well. I say surprisingly because I came into the experience thinking it'd be difficult to navigate, hard to hit the right things on screen while driving etc., but there was none of that. All in all it was a nice experience, and I can't say I missed physical knobs and switches much.

The one thing I immediately did miss in the car though, oddly enough, were the assist handles – the ones above the passenger doors where you can hang dry cleaning etc. There were none of those. I know this has nothing to do with the original question, but still. One of those details I didn't think I needed (or wanted) until they were missed.