A new leak has revealed the Nvidia GeForce RTX 5080 laptop version will not offer much in the way of a CUDA core count increase over its last-gen counterpart. Instead, it will leverage the new Blackwell architecture and 16 GB of GDDR7 VRAM to offer anywhere between a 40-60% performance boost. https://www.notebookcheck.net/Nvidia-GeForce-RTX-5080-laptop-version-may-launch-with-fewer-CUDA-cores-than-initially-anticipated.935331.0.html
The performance uplift will come from the shift to GDDR7 rather than Cuda core count.