The information on this unit says that "TV must have an HDMI input that supports HDCP 2.2". My TV is quite old and I suspect it does not have this. Is this a requirement to view 4K content only? Will the device work on my TV if all I watch is non-4K content? Thanks.
Yes, HDMI 2.0/HDCP 2.2 is a 4K requirement. Your player will still work fine for 1080 or lower content. I had my Ultra 4640 connected to an older 1080 plasma set and had no issues. I could even watch 4K material, but of course the Roku sent it to the TV as 1080. Makes HDR content look terrible, but it's still viewable.
However (ya knew that was coming) some of the early TVs with HDMI inputs will not accept 1080p video, and the Roku does not support 1080i. It does support 720p, and most of those TVs will also accept 720p. But there are a handful of early HDMI sets only accept 1080i or 540p via the HDMI jack, and the Roku supports neither resolution.
Dan Roku Stick (3600), Ultra (4640), Ultra (4670), Ultra (4800), Premiere (3920), Insignia 720p Roku TV, Sharp 4K Roku TV, Nvidia Shield, Windows 10 Pro x64 running Serviio and Plex on a wired Gigabit network.