The on again, off again Digitimes rumour-mill claims both Apple and manufacturing-partner/device competitor Samsung are looking into solar cells as a future power source.
Samsung and Apple have been evaluating the possible niche market for solar-powered consumer products and considering the inclusion of Taiwan-based solar firms in their respective supply chains. However, according to Taiwan-based solar firms, these niche markets will need a longer time to develop.
The technology doesn't seem to be ready, let alone affordable or scalable, so anyone waiting for iPhone 5 and it's "unique charging method" to start drawing Kryptonian-style power from our strong yellow sun shouldn't get their hopes up too soon. But one day? Who knows, maybe it'll be "up, up, and away" with cables for good.