Another of our favorite OTA (over-the-air) DVR makers, Tablo, has a new $249 piece of hardware called Tablo Metro. Billed as the first dual-tuner DVR with internal antennas, it’s aimed at people living in, well, metro areas where the signals are strong and access to the roof is iffy at best. Perhaps better news for network DVR fans is Tablo’s improved Roku app.