Disclaimer: I don't work anywhere near the QUIC, SPDY, or other protocol guys.
I heard someone here in a express it this way at a techtalk when asked about the motive for doing things like SPDY (paraphrased):
"We want the web to be as fast as possible for EVERYBODY. So some of us are building things like SPDY since we can implement it both the server and browser for Chrome users. Meanwhile, other folks are working to make the web faster for non-Chrome and mobile users too (PageSpeed, our public DNS, paying people like Steve Souders to do performance research, etc.)"
I heard someone here in a express it this way at a techtalk when asked about the motive for doing things like SPDY (paraphrased):
"We want the web to be as fast as possible for EVERYBODY. So some of us are building things like SPDY since we can implement it both the server and browser for Chrome users. Meanwhile, other folks are working to make the web faster for non-Chrome and mobile users too (PageSpeed, our public DNS, paying people like Steve Souders to do performance research, etc.)"