Yes - absolutely. You are entitled to 90 days screen breakage warranty as well.
No. Honor 8 camera does not come with Leica branding.
Yes, Honor 8 does have LTPS Scratch Resistant (Low Temperature PolySilicon) glass, which is even better than gorilla glass.
No. You cannot record 4k videos but you can play 4k videos on Honor 8.
Yes, you can adjust color temperature in Honor 8.