When Apple filed a patent for a Wireless Power Utilization in November, people speculated that the upcoming 5S would have wireless charging. The wireless charging system that uses near-field magnetic resonance could be released in time for the 5S.
However, 9to5Mac is speculating that the technology will take longer to develop. iOS 7 may not have the capability to handle wireless charging, so it may have to wait until the iPhone 6. We hope Apple hurries up, though, because HTC and Nokia already offer some smartphones with wireless charging capabilities.