This. So much this. It's also really cool as a 'niche' project, and felt even approachable to someone like me who hasn't ever done more soldering than his first PS1 and a modchip.

I read some months ago that tinypilotkvm.com is doing JUST fine.

So yeah, sometimes niche markets can be profitable. And it doesn't have to be millions of dollars in VC money obviously to be invested.