We Went to the Tron Legacy launch night at our local media museum. It was dead at first as we entered. We were invited straight away to have our photos taken against a green curtain holding a Tron disc and have the picture put on the website. If I'm honest I did want to do it but infact it was my son and stepson who did it without inhibition. They had the new xbox 360 game of Tron legacy and the original arcade 80's game. We stood with our back to the old 'classic' as the HD image of the newer one held our interest. My wife asked what Tron was and as I explained it was a computer mainframe she interrupted with "no, I mean I've never heard of it, is it a film?"
I only saw Tron the original movie in the last twelve months strangely enough but I'd known of it since 1982, it's just that I watched Star Wars instead every time. I saw no people dressed amusingly in homemade outfits but then it was a few hours until the midnight screening and maybe the dedicated viewers would roll up then. 
I couldn't sit through a film until two am ever. I have got tickets for Sunday evening instead.