[GeneticGenesis]

I disagree. I've seen P2P outperform traditional CDNs many times, take a look at some of the data from Peer5 I linked below around improving the user experience.

P2P doesn't need "always on" boxes in large scale live stream scenarios, which is one of the use cases where it works best. I think we'll see a lot of growth in hybrid P2P/traditional CDN in the next couple of years.

[BigJono]

The big problem with P2P is it doubles the bandwidth cost for the end user. Not a problem if we're talking desktops in countries that aren't 3rd world (or Australia). But most mobile plans still have strict bandwidth limits. If you have 10GB of data a month, do you want to use 1GB to stream a live event for a few hours, or 2GB?