I think the biggest difference between the two is the sheer amount of data being thrown around. A multiplayer game like Destiny will play just fine on at little as a 1Mbps connection. That's 128 kilobytes per second. Even low quality A/V streaming requires vastly more than that. So on a given connection a stream can only react so fast because it's still sending out the last block of data. Additionally, in a gaming environment you can smooth out the data and make predictions to fill in gaps where data may have not arrived. These predictions are fairly easy in a game because there are rules that players are expected to follow. Not so with streaming. On top of that, people are extremely sensitive to these little timing issues. Even when I've tried in home streaming of a game, which is one way over a 1Gbps link, the delay was perceptible in spite of the fact that it was likely only a few milliseconds. Racing games felt sluggish. So, is it possible? Perhaps not with today's technology. There's always hope for tomorrow though.