Have Roku 3. Have 2 HDMI ports in non-smart tv. Have smart Samsung blu ray . Cable box (xfinity) = 1st HDMI, blu ray = 2nd. Roku = 3, dedicated HP laptop (which I might not even need) = 4. And for what it's worth, have a galaxy s5.
*I would like everything to talk*
A) Both cable box and...