I think there's a home entertainment gap that will soon be fixed. (i.e. google + sony teaming up), but it's gonna take a while to develop and adopt.
I personally would like to see something PC based that actually ties together all my entertainment systems and media. There's some stuff out there, but nothing as versatile as what I want to do. I've got hundreds of backed up dvds, thousands of mp3's, i use hulu, I stream over netflix, a little youtube here and there, I have several tv's around the house, laptops spread around the house, disparate sound systems per room, guitar amps and pedals, just think of all your inputs/outputs. I want them to ALL talk to each other SEAMLESSLY.
Oh, and of course my truck - i want to be able to control it all from my truck, along side the house lighting system, the security system, my coffee maker, anything with a circuit board and comms capability.
I want a real mesh network that ties everything together in my house - all of it, no exceptions. And the command and control software to run it all, from wherever I want, whenever I want, and to do it SECURELY. And I want it from a reputable vendor that will support it for life, with forwards and backwards compatibility, and a useful support line.
Once somebody breaks into that realm, there will be copycats - and an entire market will appear overnight.