Latency
Native TV apps on TV sadly don't have low-latency (LG, Samsung, Sony f.e.). The purpose for Twitch is to talk/play/react directly to the livestream,but it's impossible. The time between livestream and reaction usually is up to 10 seconds plus the time you need to answer. This creates a time window where the community is out of sync which leads to chaos, so it's sadly not enjoyable to watch Twitch over TV.
This also creates a cycle of spending even more energy than usually needed - smartphone + TV vs. PC + TV. That's an additional 180-300W just for talking and reacting with the community in a pleasant form.
Solution: enable low-latency mode for TV apps.
Tested on Samsung JS8090, LG OLED CX, LG OLED G4