What is better HD or 4k resolution?

Related questions

1. Is full HD better than HD Ready?
2. Is 720p better than HD?
3. Is full HD better than HD?
4. Is full HD the same as 1080p?
5. What is difference between HD and full HD?
6. Which one is better Full HD or HD ready?
7. Is it worth getting a 4k TV?
8. Whats better HD or 1080p?
9. Is 720p better than 1080p camera?
10. What's difference between Full HD and HD Ready?

Tags

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4. #number
5. #although
6. #inches
7. #million
8. #resolution
9. #bigger
10. #little
11. #above
12. #numerous
13. #typically
14. #larger
15. #sizes
16. #times
17. #smaller
18. #offers
19. #pixels
20. #1080p
21. #ultra