Minimum specs for client-side GPU

Hi again,
I asked another question about the support for browsers, but what about hardware? Do you have any resources that tell me what minimum hardware specs a client may need? What about mobile VS laptop VS desktop GPUs?

The minimum spec for the GPU is very much dependent on the app that is being built. You could be building a simple viewer of small CAD models that can run on a phone, or a high end VR app that needs a workstation. So the minimum requirements for a GPU, is simply a GPU capable of running WebGL, which is pretty much any GPU on the market.