Let's not forget that regardless of medium the cinema is a social experience shared with a sometimes large group of friends and strangers. I'll always remember the whole house reacting to a short and exciting sequence that I had constructed in a small cutting room with only the director for company.
I write this in response to those electing to never go to a cinema but enjoy their films at home. I understand that some cinemas in US can be hazardous and a trip with family can be expensive and that the home cinema is a valid choice, but the slow demise of the social experience concerns me more than digital projection.
BTW film sound has been digital for many, many years but there was no outcry about the loss of the poor quality optical mono track and suggestions of the superiority of the (sort of) synchronised disks that were used as one of the early sound systems.