I also have a suggestion for the Android tablets at Melectronics. As these tablets are more of a luxury product, they should be able to show what you can do with them. Apple already does this quite well in its advertising, but since there is no such thing for competing Android products, Migros could become active here itself. And with Android devices there are even very sophisticated possibilities here.

Would it be possible for Migros to connect all display devices to a central Google account (would standardize device control) and install a few selected apps for customers?
There are so many really good apps that can demonstrate the possibilities to interested customers. And maybe some advertising revenue could be generated here. For example, a functioning TV app from Teleboy, Zatto or Wilmaa could be offered on the exhibits. Classic apps such as those from SBB, search.ch should not be missing, as well as a few more specialized apps such as MyScript Calculator and a few games such as 100Doors or similar.

Hey, maybe you could even show the interaction of the individual products. How about offering the possibility to control one or the other TV from the tablet. By changing channels or displaying videos on the tablet on the TV using the corresponding TV apps.