1) I will confirm, but I am 90% sure my Plasma has an HDMI input.
2) I use a Time Warner cable box, which does have an HDMI output.
3) I use my Panasonic Blu-Ray player to Stream Netflix. So if the Oppo doesn’t have that capability, I would have to explore an alternative option such as the Roku.
4) There will be times when I will want to listen to CD’s via the digital source, or at some point explore computer audio. Then at other times, simply watch a DVD or Blu-Ray.
I’m a little green when it comes to video, and also digital, beyond spinning a CD.