It would be less painful but still a problem: SPDY / HTTP/2.0 allows you to send more traffic over a connection but they can't do much for round-trip latency if you need to do something like ask what sizes of an image are available. That's particularly painful on cellular networks with a delay measured in hundreds of milliseconds – SPDY's ability to ship many things in parallel would only come into play after the browser knew which resources to request.