Yeah mobile & any desktop chips with a video output are a generation behind. So the 3400G is the same tech as the 2600. 4800H in the laptops is comparable to a 3700X, albeit running with much less power pushed to it so is a bit more limited.
The 8 core mid-range 4800H in the laptops is still crazy insanely powerful. Nearly twice the passmark score of the 6 core i7-9750H. Just insanely powerful for a laptop because the 7nm scales so differently at the low TDP levels compared to Intel.
This is a clever way of getting rid of excess supply as there are enough people who will happily part with their money for that 1 extra benchmark point.
^ ...could indeed be a clever way to unload some excess supply, and apart from benchmarks, there really are folks looking to upgrade now for whatever reason. While I would also wait for Ampere (apart from already having having 2080TIs with VRAM > 2050), it is not clear when what 3080 series will not only be 'PR-released', but actually available to buy...a lot of uncertainty with the current Covid situation.
If I would be MSI, I would make sure to release a water-blocked version / option with the new VRAM as well, like they have with the current 2080 Tis - They're not aiming for the budget-conscious customers with this new release anyhow.