Reason I got confused was because Ambient calls the WS-2000 display (same as Ecowitt HP2551) a tablet. I know, its a dumb thing for Ambient to have done.
To run a real tablet as if it were a display console you'll need to publish to a website your own weather template like Weather34. As there is no app for viewing weather on the tablet. Unless you count running the WU app, and that would not not be optimal. The Ecowitt WS View app is intended to manage the GW1000 and shows you live data but it not be nicer than the proper display console. The Ecowitt WS View does not show you data from the HP2551 display though, all it does is configure online weather services and update firmware. It can show you graphs of WU favorite stations but that is not a replacement for a display console either.
The size of the tablet isn't the issue. The issue is that there really doesn't exist any app or for you to run on the tablet...unless you make one. And even then where is the data going to come from and how instantaneous and live is it? WeeWx can also publish to a website with live view. Other software like Weather-Display also have live views. But these are all websites that are generated and not apps.
Even if you go through all that effort you still need a console to get the data in the first place. So the tablet would be in addition to a console not instead of one. Granted the console doesn't have to have a display, like a GW1000 or an ObserverIP or a Pi with SDR. So back to your original statement, it isn't really a choice to have a console versus a tablet, you need the console...then you can add a tablet if you create content for it.