We do live in a world now where The Shield, a show shot on 16mm film, is being remastered in 4K. So I guess anything' possible.
Wally Pfister's expert opinion was that you'd have to scan in 35mm negative at somewhere between 8k and 12k res to really get all the detail it's capturing.
It's just that 8k is prohibitively expensive right now for anything other than capturing and scanning.