It seems that since the regular premier can record 2 shows on OTA or 2 shows on cable, it would suggest that each tuner is a dual-tuner. So why can't it record 4 shows, 2 OTA + 2 cable? I doubt there is hardware limitation. Since the premier 4 can record 4 cable shows, it doesn't seem like the HDD or interface would bandwidth limited. I wonder if Tivo would be releasing another version of premier to do what I suggested, 2+2 recording. I would think it's just a software tweak to make this happen.