Comment by Silhouette

I've been looking into this possibility myself, as we're currently upgrading our home entertainment systems and I was unpleasantly surprised by the lack of alternatives to "smart" TVs.

Unfortunately, typical home or SOHO Internet and wireless set-ups tend not to support something like shoving all your AV equipment on a separate VLAN when it hits a wireless router. Ideally, you'd probably want either direct access from that router to the Internet, isolated from your main network, or if you've got a slightly more advanced set-up, the ability to set up a static route that will only allow traffic from the AV part of your network to your Internet router, again fully isolated from your main network. Sadly, playing with VLANs tends to need a step up to a more serious level of networking equipment and in particular routing hardware, and the price for that is prohibitive at present.

It would certainly be interesting to see some advances in basic routing coming down into the home/SOHO markets, though, and potentially developments of consumer-friendly hardware firewalls as well. As homes become increasingly networked and automated, I suspect there is going to be a growing market for dealing with these kinds of security issues but with minimal set-up and as few different items of networking equipment as possible.