Which is better Blu Ray or HD?

Related questions

1. Is Blu ray or 1080p better?
2. What quality is SD?
3. What does TS mean in video quality?
4. Will Blu Ray be replaced?
5. Will Blu Ray upscaled to 4k?
6. Will 4k play on Blu Ray?
7. Is Netflix as good as Blu Ray?
8. Are blu rays dying?
9. Does Blu Ray look better on 4k TV?
10. Is Bluray better?

Tags

1. #machines
2. #players
3. #deliver
4. #cheaper
5. #storage
6. #versions
7. #piracy
8. #discs
9. #space
10. #sharp
11. #advanced
12. #layer
13. #protections
14. #resolution
15. #against