I don’t see this changing anything for me because of the small number of us not smart enough to learn how to play right handed, (my favorite BP quote.) We lefty’s will almost always have to order our basses, but I understand that. I doubt Best Buy will be any different in that regard.
I buy a lot of stuff at the Guitar Center but I’ve got a Ball on order from Pete, just bought an Ampeg bass cab from the Music Loft (a local mom and pop store) and I get lucky on eBay sometimes. If Best Buy has something I want I’ll buy from them too.