This idea makes great sense so long as the industry reaches agreement on implementation standards so as to mimimize the cost of exchanging old for new panels. What's needed post haste are standards like those used in the shipping/container industry where sizes, mounting hardware etc. are all standardized and fully interchangeable.<p>If thought out well—and barring any exceptional idea that comes out of left wing—then such standards should long outlive normal/evolutionary panel replacements.