If NVIDIA could be easily replicated, Intel would have done it.
There are multiple initiatives to eat their lunch which is based on Cuda.Their advantage isn't even in hardware, but rather how they've invested years and years in having integrated software + hardware solution for AI.
If leader is still innovating at a pace greater than any competition, then competition will never catch up.
Maybe AI is here forever, maybe there are different approaches that will blindside them?
So Intel only needs to come up with something relative cheap that's good enough (it can easily use > 4 times more power to perform the same task) to force Nvidia to cut their insane margins.