Time is definitely an issue and if you imagine that some of the accounts that are curating are "supposed" to spread out 3 million SP in votes manually...

I predict when it comes to flags that there will be negative curation trails to join where manual curators will do the reverse of what is done now. It is going to get messy and could be a lot of fun ;)

SP is going to be more and more useful as time goes on as more than a potential earner.