[sahaskatta]

The Nest thermostat also had a square screen under a cover that makes it look round. (Not sure if newer Nest models actually have circle screens.)

[notatoad]

i believe the new third gen that was just released a couple weeks ago is the first Nest to actually use a round screen.

[jeffgreco]

It's actually octagonal: http://www.fastcodesign.com/3050576/3-design-trends-hiding-i...