Mike Beasley, writing for 9To5Mac:
“With MCTCP your iOS 7 device will be able to stay connected over both LTE and Wi-Fi at once. If your Wi-Fi connection fails, the LTE connection would continue downloading the data uninterrupted. You would likely never even know the difference”
Great new technology; That's the end of fading Wi-Fi cutting my iPhone's connection to the rest of the world.