The pixel-shift of the Sony A7RIII and Hasselblad only works to remove the effect of different pixels having different color filters in a Bayer array, with the result being an image with 4x resolution and each pixel containing full color information.

To perform supperresolution imaging, you need some statistical information, some sort of prior, on the scene being imaged and the processing requirements are not insignificant. Can potentially be done, but not in the simplistic pixel-shift sense that recent cameras advertise.

As I understand it, a lot of the pixel-shifting is to avoid de-bayering effects, not to provide superresolution. I'm more familiar with the A7RIII, so perhaps the Hasselblad does superresolution?

Unwinding sub-pixel structure requires, in general, careful deconvolution algorithms.

Do they use a COTS sensor with clever DSP or do they build a sensor that's actually capable of sampling?