That goes without saying, and isn't an interesting answer in this case.
When I mentioned panopticon benefits, I was more directly implying the complex "cui bono?" question of whether or not this data continues to entrench Google's behavioral analysis arms that use such data to sell our every behavior to advertisers for the purpose of buying our attention. It's not the websites using reCAPTCHA that benefit from all that extra advertising information stored on Google's servers, and it's not necessarily the individuals like you or me using those websites that's benefitting from all that extra information on Google's servers.
Especially given that in v2 it seems very clear that Google has been using reCAPTCHA as their own personal Mechanical Turk to also entrench their positions in map data and possibly automated driving image recognition, this is not an idle question.