The new Ampere-based GeForce RTX 3000 series cards will reportedly offer more VRAM on all cards, so we could see:
NVIDIA GeForce RTX 3070 - 12GB
NVIDIA GeForce RTX 3080 - 12GB
NVIDIA GeForce RTX 3080 Ti - 16GB

When it comes to clock speeds we should also expect Ampere-based cards to have between 100-200MHz GPU clock speed uplifts versus Turing, all while being more power efficient thanks to the new

Ampere GPU architecture and the fact that's on 7nm