I do a lot of face to face software demos, and I want to show the customer a tablet and screen share my desktop, it's way less awkward than having them sit next to me. Is there an airplay equivalent for Ubuntu where I can share my screen with a vanilla Android tablet?
It's relatively easy to do. Just enable remote desktop sharing on your Ubuntu computer, and then use a vnc client on the android tablet.
So for example, on the kde desktop, use krfb. I think on gnome you use remote desktop sharing from system settings.
Any vnc client on android should work.
Don't forget to allow the incoming connection through your linux firewall.
I would not recommend this for internet access though, only on a local network.