Took me awhile to remember what it was called, but TinyPilot [^0] by mtlynch is pretty cool. Michael sometimes writes about running a hardware business on his blog [^1].
1080p makes it a total non-starter for me, that sort of resolution is over a decade out of date, even for small laptops. Not sure why people think it's an acceptable maximum.
I drop down to 1080p myself when gaming on weak computers, but I generally use 4k for clarity because I stare at code for many hours each day (sometimes more than 16). So I would definitely want the capability to stream 4k if I'm reading text, browsing the web, etc.
Seems like currently the competitors to this product are the Pi-KVM and the Blikvm.
Seems like Blikvm have a number of interesting form factors, such as PCIe card and rack mount, which may be interesting to those looking into this space
Not exactly a startup, but a small business.
[^0]: https://tinypilotkvm.com
[^1]: https://mtlynch.io/posts