Reminds me of those video and B-max adjustable cassettes. You had to take an Allen Key hex and expand the case in 3-D! Of course you had to re-thread with a wider tape. But it was well worth it. I was always attempting to get the same quality of B-max using the skinnier tape. Funny, I never achieved it?
The next thing will be a burner that goes ahead and burns DVD and BD AT THE same time!! Then there will be a format that will combine ALL the technology into ONE simple burn.
This IS becoming one of those Xmas Cracker jokes: "How do you tell the difference between a DVD and BD disc?" " (you provide answer here)"