Maybe some don't, but I think many of us love the feel and process of using a film SLR. Rotating through the shutter speeds. Deciding to set and burn 160 ASA film at 100 for slight overexposure when shooting portraits....Arrrgh! Retro? Call me a forward looking evolution/revolution tart, but I like new stuff. The often subtle changes that bring better design and ergonomics/useability and so on, are my tech tool turn ons. Just so long as the changes will deliver options for me to take better pictures.
It's not how cool I look taking snaps at my local cafe with a "statement" camera, it's the magic in the images that I come back with that count for me.
Whether it be cameras, cars, kettles or toasters, in my possibly narrow zeitgeist, Retro happens at a point where industrial designers have run out of ideas.