* 1-4 years from now: we have a robust scalable blockchain from someone, maybe Ethereum. This is essential for anything big to follow.
* 2-5 years from now: we get a robust identity and reputation system. Or likely multiple reputation and identity systems
* 3-6 years from now: blockchain tech moves beyond startup and incubator stage with a few widely used apps. Maybe intl money transfer, a decentralized social network, or decentralized AirBnB.
* 10-25 years from now: the things that are referred to in the OP article above by Joseph Lubin occur.
You asked about 'immediate wins'; for Ethereum it is mind-share among developers. At present Ethereum is the place to learn smart contracts and to experiment with code.
(which I would call a qualified success, I think it is handy for a small group of people more than it is really having any impact on society)
I'm glad that you enjoy maximalists, and whatever they do it's certainly no skin off my nose. But you might consider that hype can harm technology adoption. Reasonable people argue that Google Glass's giant smoking crater set AR back. And the hype and crash of the Segway did no favors for the more immediate uses of that technology, like Kamen's wheelchairs.
I'd also point out that however much Jobs sung the praises of the crazy ones in ads, he rarely let hype run ahead of consumer utility for his products. Crazy things stayed in the lab, and were polished until they actually worked for real people. As Jobs said, real artists ship. Personally, I'd love to see more of that ethos from the blockchain world.
For context, in the cryptocurrency world, often the word maximalist is used to refer to hardcore tech evangelicals; so there are bitcoin maximalists and blockchain maximalists. Even though I am naturally a skeptic and not a maximalist, I don't want to discourage them. Yes, they're crazy[2]; a part of that craziness is a hope for a better future that I find refreshing.
[1] http://www.meetup.com/EthereumSiliconValley/
[2] https://www.youtube.com/watch?v=8rwsuXHA7RA