Do yourself a favor, don't respond to 24/7 liarhub crew. While there is some truth about 70mm can't be scanned by lasergraphics the director as detailed here http://www.lasergraphics.com/director-features.html , interstellar has many versions and ultraflix has its own version of 4k and there is one for IMAX which has resolution much bigger than a 4k. The rest of his post is either pure fabrication or he has inside info.