Would it benefit any of us today?

Now there's a good question. I think it would, if you mean 'us' as our current modern pseudo-globaised culture as to understand what a site was about, would require a fairly major shift in consciousness for a lot of people, they'd need to be able to see things over a longer perspective, like Tiompan says above (I think), a lot/most/some sites were significant for different reasons over different periods to different people.

To be able to fully appreciate this, perhaps by the advent of a swarm of nanoscale fast-forwardable time-travelling video cameras, each with a microphone connected to auto-translation speech recognition software, so they could swarm throughout time and space to give us a full idea of the lives of all the cultures responsible for our prehistoric monuments, well, that'd be a good thing in my book.

It would make people stop and think. And perhaps for the really annoying ones who just concern themselves with status and material goods, perhaps it'd overload their synapses and make them less likely to get in the way of everyone else :)