As of right now most of this is not very relevant to the commercial solar industry, which relies on single layer silicon cells with an efficiency of about 20%. But I think it is important to realize that the potential for much improved yields is there. As we get ever better at manufacturing complex chips made with alloys like gallium arsenide, the price of these high-end systems will fall.
Another technology with great future potential is thin film technology, which allows functioning solar arrays to be made on paper-thin, flexible sheets that could be used in all sorts of ways. Cells that automatically adjust themselves to take maximum advantage of current conditions are also in the works. Solar is a new, rapidly developing technology, and it will keep getting better fast.