The percentage of programmers working in VC-funded jobs is tiny. I won't say that it wouldn't have any effect, but the effect would be minor. You might have to go and do some drudge programming work in an anonymous department inside inside BigCorp, and you might not get paid quite as much, but it would not be catastrophic - the need for software only continues to increase in the modern world, and I for one don't see any reason for that to stop any time soon, regardless of what VCs may or may not be doing...