You've also got to consider that the higher the bandwidth a stream is, the harder it is to deliver it with a low latency. If every packet has a risk of being d

You've also got to consider that the higher the bandwidth a stream is, the harder it is to deliver it with a low latency. If every packet has a risk of being dropped or of arriving out of order then increasing either the size or the sheer quantity of those packets will also increase how often they get mishandled or buffered. Plus you run into compatibility problems between different kinds of devices such as mobile users trying to connect over spotty 3G connections.