I couldn't find a better section for this (perhaps we need one in the Consumer Electronics section) so here it is. For a complete novice in the area, would someone please explain what's required to replace the cable box on the TV, i.e. hardware, software, sources of content. If viewing includes major and cable networks, movies, and some sports channels, do you have to go to multiple sources/subscriptions to piece together cable replacements or what? Thanks.