Earlier quoted context omitted.
I went with raspberry pi + LCD. Even though there are many LCD options I recommend going with their official pi touch display, it just works without headaches. I did use their official enclosure, but it doesn't really seem to be well designed for wall mount (some 3d printing and magnets helped). I think going with an android tablet is fine and headache free. I just don't like aesthetics of that solution.
> I think going with an android tablet is fine and headache free. The problem with many tablets is that leaving them plugged can cause batteries to swell, which can end up being a huge headache. I've heard stories of offices that used iPads as wall mounted displays having this problem, so I don't think any particular make or model is immune to this issue. I considered Pi+Monitor, but for me, something like the Pineta…
Of course you should go for what is easier for you, and the pinetab does sound easier, however I'd argue that it is not cleaner.
Separating the screen and main unit will allow for a more serviceable solution, changing either piece if it breaks, or upgrading the main unit if you need more power/different connectivity.