It will legalize DraftKings I believe on a state-by-state basis. This was a law I understand pushed by Nevada casino/bookmakers who wanted a monopoly on this to protect their profits.
There was already a federal exemption because of the way daily fantasy was constructed (it was considered a game of skill not tied to the win/loss of a sports team, since you had to pick individuals from different teams). However, several states made it illegal.
Yeah, with DFS (daily fantasy sports) you're even limited to x number of players from a given game, so that you're not effectively betting on the outcome of that game by selecting an entire team.
I never really understood how they got around the limitation with stuff like NASCAR, where you really are essentially betting on the outcome of a single race. Maybe it's like PGA where the tournament is the culmination of a set of matches or something.