Peer5 is actually a really interesting example of how the user experience can be improved using peer-to-peer, particularly in areas with less capable internet infrastructures - their technology _only_ kicks in if the user experience can be improved by using peer-to-peer, and it'll fallback to traditional CDNs if they can't improve the experience.

Despite this logic, they were capable of very impressive P2P offloads during the world cup. Their datasheet linked at the bottom of this blog post is worth a read for more details: https://blog.peer5.com/what-a-world-cup/ (email address needed)