Putting aside micro-design trends that come and go per decade given this has been happening for longer than just for one or two, my bet's on: a) corporations s

Putting aside micro-design trends that come and go per decade given this has been happening for longer than just for one or two, my bet's on: a) corporations skewing towards multi-use capabilities (your camera is not just your camera, it's a phone, mobile computer, app machine, and camera all at once) and b) corporations trying to capture the maximum amount of dollars (said more uncharitably: cater to the lowest common denominator). There's a lot of sister comments here that mention that colors evoke strong responses - it can be good, but bean counters are going to cringe at every lost sale and agitate for neutrals. Personally I wish the transparent devices of the 90's would come back. seeing the internals was magical. :)