One thing we haven't seen change much in Android over the past several versions is the hotspot feature. I'm sure many of us have used it quite often, but it's one of those things that basically works fine as it is.

Left: Nexus 5, Right: Nexus 6

With Android M, however, Google is bumping the hotspot feature up to version 2.0, which includes one somewhat major new feature: the ability to broadcast in 5GHz mode.