I understand why samsung only launch 10.5 model.
Android tablet market is small, there isnt much people willing to spend a lot of money to purchase one.
8 inch would not enough for heavily users; 12 inch would be expensive so Samsung decide to just doing to middle one.
LOL, I'd hate to be your parents around Christmas time. Dear Santa, I'll take a hover bike, a time machine oh, and how about a magic wand. bro, if you stand any chance of getting what you want you got to stick to things that currently exist. They still just by a small margin have never even made a tablet that was released with the fastest current processor in their smartphone lineup. The Essex was closed but didn't even come with 855 plus. News flash, they're not catching up to Apple overnight.
Honestly I feel like Samsung is going to glaze the right over this request. You didn't say anything original. You just said bigger faster stronger. It takes far more due diligence to understand what that segment actually needs. Versus what it can afford. Tablets are still considered 2-Foot UI. They are handheld devices with mobile Hardware. 4K doesn't make any sense as you won't be able to tell the difference without increasing the screen size by 3 to 4 inches.