I’d like to chime in a bit on what I think is going on with the TabloTV and framerate. The 1080i channels are broadcasting 30 frames/second, but interlaced at 60 fields per second (each frame has 2 interlaced fields). TabloTV is probably taking the fields and combining them into a progressive scan frame. The motion effect you get from this is going from a “soap opera” effect to a “movie film” effect since you are virtually going from 60 fields per second down to 30 frames per second, combining the interlaced fields into one frame. Some people are sensitive to this and others are not. TabloTV would have to keep the frames at 1080i (60 fields interlaced) or go to 720p (60 fields progressive) in order to eliminate this effect, especially on fast moving programming, such as sports.
For 720p channels, the frame rate is still 60 fields per second, but these fields are progressive, so they are 60 full 1280x720 frames per second. Again, TabloTV reduces this to 30, so in fast motion, you will notice that “movie film” effect. I don’t know if TabloTV has any plans to change the frame rate for better matching the ATSC standards since the devices (Roku and Amazon Fire TV) may not support 1080i/60i or 720p/60p.
My background on this has to do with manipulating frame rates when working on videos from my 1080p/60 camcorder. Since 1080p/60 was a new technology when I bought it, I had to reduce the frame rate to 1080p/30, 1080i/60i or 720p/60 to better match blu-ray standards. When reducing the frame rate to 1080p/30, the effect is exactly what you see on the TabloTV…it looks like you are watching a movie filmed at 24 frames per second. If I reduced the resolution to 720p and left it at 60 frames per second, it was smooth, like a soap opera. The last option was interlacing the video and leaving it at 1080i so I could get the 60 fields per second (2 fields per frame)…this worked, but I always hated interlacing valuable progressive quality recordings!