Union Square Ventures' @mignano is bullish on consumer hardware because of how defensible it is from big AI labs: "Hardware has often been thought of as too hard, and so venture capitalists often ignore it. We might want to rethink that a little bit." "Hardware could be considered a wedge now. Maybe it's actually a defensible layer, where if you can have a successful product there, that's going to be a lot harder for a massive foundation model lab to go and replicate than leveraging their…