fixed. gtv is largely dead. and yes ccast is based more on gtv than android.It will all be in the TVs in time and these add on devices will be dead. You can already push content to TVs with DLNA. Google TV did the same thing that chromecast does for the most part (I've heard the sw is really based more on google tv than android).
Remember when you used to travel? You had an MP3 player, a camera, a GPS, a phone and a computer. Now it all fits in your pocket.
Everything will run through the smart TV because consumers have a hard time with boxes. They want one remote. The only thing stopping this is media companies and device companies all fighting over a proprietary interface because they want control.
until smart tv's come down more in price chromecast is arguably a better value. or will be once amazon prime and hbo go are supported.