There are a number of devices out there and recently I have been experimenting with quite a few of them (reviews coming). Arccos, Shot Scope and others are designed to give you the data you want, without really interrupting your round of golf.
Post round, there can be a lot or a little to dive into, completely based on what you are looking for. From what clubs you are efficient with, to where you are losing strokes and need more practice.
My question is, do you want to know? Are you ready for data that is designed to help you get better and choose clubs appropriately?