Including ones with two sizes of handles (one set of handles for dangling from hands, the others for slinging over shoulder), which I guess you could alternate based on whether you're visible to to muggers.
I even saw a canvas design that had a color and finish to look very reminiscent of grocery store brown paper bags.
The similar bookstore canvas tote bags might be seen as more likely to contain a laptop or tablet (since some people use them just like others do backpacks). So I like the grocery one.
One advantage of the movie prop one -- in the office -- is that I could imagine a stylish designer type carrying it to a conference room table, more easily than a frumpier canvas bag.
Personally, I use a functional plain all-black backpack that looks presentable in the office (including carrying into the conference room, but put on the floor/chair), yet understated on the street.