I really feel like this is a waste of development time. Not because it's not an interesting project for Android hobbyists, simply that there's such a slim user case and such little upside to using an Android desktop that for an actual profit-seeking entity it's just... A bad idea.
I get the potential idea behind really thin, cheap desktops for libraries and schools and stuff. Except that we already have those really low cost desktops around. It'd take a LOT to beat those existing systems on price and even then, running on an OS that your tech team is (understandably) not trained for brings up all kinds of problems, and that doesn't even start on the problems for users not being used to it. Even being able to save space for towers isn't that big of a deal when you are going to have to have a monitor and keyboard and mouse too.
Add to that all the missing software and you start seeing everywhere that this falls down. No matter how populous the google play store is, core applications are fundamentally different on that platform. Just simply stuff like using a different e-mail client and lacking right click menus is a big stumbling block for casual users.
The Ubuntu hybrid mobile/desktop idea has a lot more legs than this. It just does. And even then that's not something that most places would want to use as their OS.
Yes, we are seeing some convergence between mobile and desktop, but the end result is going to be us all using Android at home, it's our phones being able to run our desktop programs.
You seem to forget that there is a new breed of users coming, whose first contact with an operating system was Android. Those users will be more than happy to have the familiar apps and interface in their desktop, and they will probably not miss any software because android is already running all the software they know and need.
Yes I know, there are users like me (and I assume you too) that started in the desktop and then transitioned to mobile. However the world changes very fast and we are a species in extinction.
When I started as a professional in computing, serious productivity was done with mainframes (already declining by then) and minicomputers. PC's where just a toy and its OS (DOS) was pathetic compared with let's say the capabilities of VMS on a VAX. Most tech savy people where despising PC's on similar premises, yet we all know the result, PC's Have been the dominating computing platform for nearly 3 decades, while minicomputers have gone extinct. I wouldn't be surprised to see history repeating itself.