Signage displays are the solution, that is, those big screens used in malls, airports, stations etc. they're sturdy built and guaranteed to work 18/7 or 24/7, s

Signage displays are the solution, that is, those big screens used in malls, airports, stations etc. they're sturdy built and guaranteed to work 18/7 or 24/7, so don't expect to pay them like a shiny but crappy consumer Smart TV. However pay attention before buying since manufacturers started to add Android based crap and "smart" features to them as well. Usually the lack of any networking, both Ethernet and WiFi, on their technical sheet is the indicator they're dumb enough to be worth of trust. This arrangement of course requires an external receiver since they're essentially beefy monitors. They also make almost-dumb TVs for the above markets. As for the brands, I'm aware of Swedx.com in the EU and Sceptre.com in the US. Samsung also makes some interesting products employing the Tizen OS (any jailbreaking available?). I don't have any direct experience with any of those however.