> I’m also interested to see if it enables cellular in laptops
Are WWAN cards not a thing already? I've never looked much into them at all, but they do seem to exist, at least (and seem to be around $20-$50 and plug into M.2 slots)
Many laptops, including MacBooks, do not have M.2 expansion available.
MacBooks do not have an M.2 slot, nor do they have WWAN.