Since this forks opendisplay, what are you doing differently? Are you a layer on top, or a different direction?

I'd have expected that to be declared in an announcement for this community.

Yup, I'll add a snippet in the post, thanks,

For answering your question, MeowDisplay started as a fork of OpenDisplay which had the foundations for screen capture, virtual displays, encoding and the iPhone/iPad receivers built, I've credited OpenDisplay and its developer Philip in the README under "Built on OpenDisplay"

After that, I've taken a more phone-first approach, with quite a bit of work on the interaction, streaming and security layers.

So it's built on OpenDisplay and not just a UI layer over it, MeowDisplay is going in a different direction, If you only need the core second-display experience, or compatibility that the OpenDisplay project serves better, OpenDisplay is well worth a look.