When we redid our house, we ran coax to the two media stations (we're not big on TVs in bedrooms), and Cat5e to 6 locations (two closets for POE APs, two media stations, an outside mount for a camera, and a bedroom that might be an office someday).

Keeping the primary media stations off the wifi keeps the wifi snappy for devices.

Helped my brother - with four kids streaming on 2 or 3 devices each - do something similar.

-jk