So, I recognize that I'm coming way back to an old point in an old thread, but:
Some of those Alibaba tablets are pretty interesting. Sure, very basic Android, and typically a far from new rev of the OS, but not only are they VESA wall mountable, they're PoE/usb/DC powered right on the back in a recessed area, and even have interesting LED status lighting on the sides.
Example: Alibaba Meeting Room Tablet with LED Status Lights
Coming from wall mounted LCD screens on another home automation system, the lack of LED status lights on wall mounted tablets is a bit of a let down for my application. Cobbling together a wall mounted Amazon Fire + some other status light (was looking at Inovelli's new switches) system to duplicate functionality was going to be alright at best.
I'm just thinking out loud here, but I may pick one of these up to play with and see how well I can integrate it. I have emails into the vendor on how the LED lighting is actioned, and will report back if I make much progress.