As @siwilson suggested, an old phone or a new $25 WiFi phone (Walmart usually has a couple of models in this price range: you don’t need to activate a contract or cellular Service for them as long as they can boot up and connect to your Wi-Fi) can work well with either actiontiles or sharptools or One of the other dashboard apps on it.
These examples are ActionTiles:
There’s also Brilliant Which now has a limited smartthings integration, but that’s a much more expensive option with less functionality. It just might look prettier on the wall. But read everything very carefully including the threads in this forum: you’re going to get a lot less functionality then you’ll expect when using it with either Hue or smartthings. It is nice looking, though.