Rumour has it that Microsoft could well be planning to use AMD Ryzen APUs for a new Surface product. Codenamed Pollock, the APUs will be low-powered chips. Commits have suggested that Pollock APUs bear resemblances to AMD's Dali architecture.
https://www.notebookcheck.net/Leak-suggests-that-Microsoft-is-working-on-another-AMD-Surface-product.470137.0.html
Keep the price range add 4 core zen 2 APU, it'll be killer product
Ideal tablet - media tablet: QHD/4K screen, keyboard with battery doubling as stand with connectors for both horizontal and vertical mode, android emulator preinstaled, super-wide 4K selfie + super-wide back camera - both working for AI input.
-gaming: +Cortana +screen refresh rate +stream from xbox support, better dac and powerful graphics also more battery.
-pro: ipxx, thermal selfie and back camera, superwide to superzoom with auto changeable IR/UV/visible filters, UV+IR lights, multi ID lock, more powerful navigation, free internet access in every nation.
Thats media, gaming and pro focused variants, all can be made cheap, you just need idea.