Nien Nunb said:
I doubt will ever be a full screen HD release of anything, let alone BTTF.
Counter-point: Evil Dead was released on Blu-Ray open matte, even though it was likely shown in theaters in 1:85. Of course, they included a widescreen version as well.
Speaking of odd TV broadcasts, I saw Videodrome on Encore in open matte HD. Sadly couldn't record it. Maybe Back to the Future will be shown in the same way.