Computer chips become better every year because they get smaller, use less materials.
We could make solar cells thinner, but we can't appreciably reduce the area that they take up. The solar cells need some backing material, brackets to hold them, infrastructure to move the electricity away, security mechanisms so that people can't steal them, and other forms of material that can't be rapidly dematerialized.
Moore's law is all about improvements in the fab process which drives down not only design rules but also defect rates to mean that putting more devices on a single wafer is more cost effective.
As you reduce the process costs then there is no reason that the cost of solar panels doesn't approach coated window glass.
Computer chips become better every year because they get smaller, use less materials.
We could make solar cells thinner, but we can't appreciably reduce the area that they take up. The solar cells need some backing material, brackets to hold them, infrastructure to move the electricity away, security mechanisms so that people can't steal them, and other forms of material that can't be rapidly dematerialized.