Yep, quite interesting.
I reckon bows have been around for way longer, but its finding evidence which is the difficult part.
I'm sure if you had figured out flintknapping then bending a stick can't have been too far behind. To me the discovery that rocks break into shapes that are sometimes sharp and the discovery that thin wood returns quickly to its original shape are something you'd figure out very very early in the piece.
Bread and beer, now there's a couple of innovations