I saw the same thing last night:

Aircraft with green laser, appearing to be scanning the ground, flying over head back and forth multiple times over the little neck / great neck area of north east queens.

It looked like it could be flying in the direction of LGA or foty totten, but it came back and forth multiple times between 4:30 and 5 am

Someone caught a video of the same aircraft three days ago:

[link to www.youtube.com]

The laser is not very visible in this video, however I can confirm that this video captures the same type of aircraft as I (and others on the internet) saw last night over nyc