It has come and gone: the menu button. Apparently, just a few months ago it was all the rage at Google, but now as part of Android 4.0 Ice Cream Sandwich, Google is urging developers and designers to try and not use the menu buttons at all, to a point where it would not exist in the hardware. What the big G wants is devs to make use of the Action Bar, first seen in Android 3.0 Honeycomb. While in some apps this may prove troublesome, most of them will have to update to work on the newer software (properly, that is), so improvements can easily be made so that actions that rely on the menu buttons are switched to vertical or horizontal positions. Whatever floats your boat, I guess.