I saw a YouTube ad last night (presumably paid for by the banks and networks) against one of the Senate bills in which they explicitly said that the big retailers wanted to take your CC rewards away, or something. They might have been talking about S.1838 but I skipped the rest of the ad so I'm not fully sure. I thought there might have been some recent action on it (hence the ads) but it still seems to be stuck in committee as of this writing. /shrug

Bringing it back to the topic of this thread, I fully expect that businesses will still surcharge even if that bill were to pass. There's a chance they might only do so if they allow customer selection of what network to route over (like what's done for debit cards) and if the customer chooses Visa/MC or whoever, but in past experience that seems unlikely.