Great idea, extremely cost-effective and versatile for the end user, and feature-rich.
It'll never work.
1. Too little, too late.
2. Blu-ray player now has 2x RJ45 jacks that do two different things (one to go to TV, other to go to router/network)--most end users can't handle that, their heads would explode. Besides which they would still end up buying the inevitable $30, 6-foot, gold-plated ultra-high-def HDBaseT-alliance certified cable for their TV.
I've worked end-user helpdesk--does it show?