+1 for allowing user’s own pictures (perhaps even multiple pictures for various States (on/off, hot/cold), though that could get complicated.
Though hard to fit on a tile icon (presuming that the App GUI continues to be only tile-icon centric…), a picture of a lamp or shelf of puck-lights, appliance, temperature location, etc., makes it much quicker to identify the associated Thing.
This is particularly important since the Tiles currently do not show the Thing “Names” unless you shake the dang iOS device (which I have stuck to my wall, and thus, cannot shake it!!!).
Of course, these user’s own pictures should also show up when selecting Things during SmartApp installation/configuration.
UI design is hard – or is it?