YC will need a change in their funding model if they want to fund these type of technologies. $14k to $20k is irrelevant if you need 3 years R&D and/or $5M capital to prototype; we need new metrics for funding businesses with high capital cost and/or long incubation time.
I love the change in focus to be more bold, real, rather than just chasing easy things like software/apps/games. But, the model must change too. I think Sam & team are up for that challenge, & will adapt, so don't think of this as a permanent shortcoming in any way.