For HDTV let's check Netflix and what they want.
https://help.netflix.com/en/node/306 shows 5 megabits per TV. Since a good WiFi runs at about 54 megabit there's no issue there.
I'll share that one of the top 10 models on CNET and Amazon works with 2 wireless Netflix HD streams without problems here. So here's the model. Be sure the firmware is current and you have a suitable ISP and DNS.
The second reason I went with this is it's dual core CPU. It felt like older routers were getting too busy with single core CPUs.
Hope this helps.
I am looking for a router to handle streaming internet tv to 4 tv's plus handle Netflix and other devices. Any help would be great