SPDY is more like an enhanced-HTML. So it's clearly trageted at browser and the web.
I think you mean "enhanced HTTP," as SPDY will be the first draft for HTTP 2.0:
http://lists.w3.org/Archives/Public/ietf-http-wg/2012OctDec/0447.htmlConsidering HTTP is now used by all kinds of apps that have nothing to do with browsers or the web- although in large part to sneak around firewalls- it certainly won't be limited to web browsers.
