Agreed. I'm definitely in favor of more demo (and hopefully less business plan).
I was at AngelHack London in April and ended up just doing a demo (of https://github.com/matt-williams/argolf) because I couldn't get my laptop connected to the projector.
Agreed. I've been at hackathons where 50% of teams just showed slides/mockups, a few had local server urls, and we were the only team demoing on a live URL.
I'm glad they're focusing even more on what you've actually built in a weekend vs what dreams you've spun.
Maybe, but don't slide decks give you the chance to sell what you've built? Maybe you need the time explain the bigger idea of what you're doing when during the hackathon you only completed 25% of it?
I was at AngelHack London in April and ended up just doing a demo (of https://github.com/matt-williams/argolf) because I couldn't get my laptop connected to the projector.