Once they patch out HDCP we'll get higher quality streams from people who actually care about quality.
Biggest problem for most people in North America is the crappy upload speeds that are common. Mine is only 2mb (get at best 1.8mbs through SpeedTest). You need at least 5mb to stream and play online comfortably. Or separate lines for your PC and console.
Some girl was already streaming PS4 using HDMI capture.