Yeah, I forgot to mention forcing a push downstream.

But honestly, I don't thing that's important. Sync-on-Read is what you do now on the web. I click on a video on YouTube, and in seconds, I'm watching an HD video full screen.

I think the only hurdle is upload speeds offered by most ISP's is slower than download speeds. But even still, outside of HD videos, all the files I'd be interested in are quick downloads (pictures, documents, music).