Google's Home Mini may receive a sizeable upgrade when its Nest-branded sequel arrives. Sources for 9to5Google claim an upcoming Nest Mini will represent a "substantial" improvement. For one, it wouldn't be confined to desks and tables -- it would reportedly included a built-in wall mount. You could place it on a wall in the middle of the hallway if that's the most convenient place. It would also have upgraded sound, including better bass and a louder maximum volume. And yes, there would be a headphone jack to plug in external speakers.