A simple idea thoroughly executed is sometimes best, and that's what Plair is aiming for with its new, self-titled streaming video adapter. The golf wedge-shaped device grafts on to an HDMI port and receives video over WiFi from custom apps for Android, iOS, OS X and Windows. While we've certainly seen wireless device-to-TV solutions before, it's Plair's sheer diversity of sources that makes the difference: along with local content, it includes the near-obligatory internet portals like YouTube and CollegeHumor ,as well as access to a deluge of video from traditional TV sources. We saw NBC intenret clips piped to a TV in remarkably good (thoug