hmmm...Apple's "Think Different" motto...why should Apple be predictable? I think it's great they are likely waiting a few months to bring out the next iPhone. This means it will NOT be a 3G/3Gs type of update, as many seem to think...that may be the pattern, but Apple is a game-changing company and they will change it up this fall.
I see liquidmetal in the next iphone and, eventually, all apple products. Remember, liquidmetal can be colored, which means the color runs all the way through, not like painted or inked on colors on aluminum, which, when scratched, reveal the "metal" color underneath.
Apple invented the 5 "flavored" iMac, and eventually went to a monochrome, yet more refined look than competition...but it has been some years of this and I get the feeling Apple had been waiting and watching this liquidmetal for some time before they acquired it.
I seriously doubt the next iPhone will be LTE compatible, Apple waits until a standard is set and perfected/available before implementing it in one of their products.
However, if they feel NFC is ready this fall, it WILL be in the next iPhone.
They will not update/refresh the iPhone "as is", too many problems with the glass back and antenna. It may look more like the iPhone 4 than the original, but it will have a liquidmetal back and an improved antenna.