Too bad he said nothing about reducing/trimming the blockchain size.
The Payment Protocol to replace addresses. Supports refunds, memos, receipts, proof-of-purchase, and digital signature.
Instead he talks about bloating the blockchain even more. Maybe I missed something but with these feature not only miners can easily include child pornographie into the blockchain but also every normal user? Why is this not an issue?
And what is with all the sybil talk?
That's actually a very hard attack to successfully pull off; I file it under "theoretically worrisome, but practically not a high priority."
But I like the idea of Proof of Sacrifice.