Poor Canon. When it comes to compact cameras, its heart is in the right place, but the market is shriveling so fast that sometimes it’s hard to see the point. Today’s example is the Vixia Mini camcorder, a video version of its quirky Powershot N. The Vixia Mini is a square box with a flip-out screen and a fisheye lens. And as a nod to smartphone users, it has Wi-Fi built in. But do we care?