One amazing thing I learned about (out of many) at the ecash conference

A router for sharing internet

Someone from India, living in a place with a lot of internet access problems, built a set-up where people can buy internet without having any internet in the first place. 1 sat per minute

He built a captive portal that you log into and the page says — I take ecash from this one mint, get ecash from there and paste it into this text box — you paste it in, hit enter, and you’re online

You’ve made an offline payment and voila, you're now online

There are many exciting Bitcoin developments happening but it's becoming more clear that ecash is a wholly different, complementary technology that does different things, including many things that Bitcoin can't do no matter how many upgrades it gets