There were TV trucks from NY and Phadelphia and many other places; reporters setting up for noon on-scene livebroadcasts.
The next shot looks down Boylston, towards the finish line. If you look closely, you can see small piles of swept-up debris in various places on the street. All the debris --- much of it ordinary trash --- was gathered into small piles, and circled with orange fluorescent paint on the pavement. I assume it was or is all going to be painstakingly analyzed, bit by bit.
There's still a heavy police presence, augmented by military police (in Humvees) and federal agencies, like this ATF truck.
So, things aren't fully back to normal here. Not yet, anyway.