The films themselves underwent an extensive high definition remastering process for Blu-ray that was approved by Bob Gale. The result are transfers that have been scrubbed clean of any evidence of dirt, imperfections, or at times, film grain. Some scenes I sampled, such as when Marty and Doc gear up to first test the time machine, are so squeeky clean the actors look like mannequins and their environment like a digital creation. Other instances, including the openings of Back to the Future and Back to the Future III, are presented more naturally with film grain intact.
DNR (digital noise reduction) pundits will likely have a field day complaining about Back to the Future on Blu-ray for weeks or even months after its release. If you can get by a cleaner image that doesn't always reflect its age, the Back to the Future Trilogy on Blu-ray looks to be a ton of fun in high-def.
and you might as well put on a dress if you help Chasergay and -gay- 
