Wiring a new house?

Hi there

I am currently wiring our new house and I am

Trying to future proof as much as possible. I've done quite a bit of reading on the Internet but am still not entirely sure if I am doing it right.... I am trying to achieve a cable free tv -so sky/Internet/media etc is hidden. I also wanted to do feeds into the master bedroom and other rooms so that media can be viewed anywhere.

I have made a main board under the stairs. From this I have sent 3 coax cables from the sky dish. I have wired from here 7.1 surround sound into the lounge using speaker cable. I have also run 3xcat6 to the lounge and 1x cat6 to each room. I've read some stuff on the Internet that suggests I need to run 2x cat 6 to each room? Does that mean I also need another 3 cat6 to the lounge?

Any help is much appreciated!

Thanks