My admittedly cynical views on this law:

There's no guarantee it'll make it all the way to the President's desk completely unchanged from its current form, and a lot can happen in its journey from committee to that destination.

History has shown that the passage of laws such as these have not stopped state/local LE from inconveniencing citizens over supposedly "settled" issues.

TL;DR version: This is all well and good, but it ain't gonna be as cut and dry as some think. It'll be messy at best, or a slippery slope at worst.