I'm starting to come around to this style of mini screen.
I Have a small desk right now, and could use a second short/wide screen under my main one as I experiment with getting into streaming. Or maybe I can find a way to mount an ultraslim USB screen or something on my tower, which is in the space a second monitor would go.
I still would never want this on a laptop, though. I don't think any streamer in their right mind is trying to use a laptop on it's own without a main full-sized gaming/art display... At that point you would have 2 real monitors and the tiny extra one would be at a weird angle, regardless.