I'm hoping this means the iphone 5 will have LTE. It could be for a future LTE iPad.
As for those who don't want the iphone 5 to have LTE since it is not available in their areas, that's absurd assuming it doesn't cost extra. Just turn off the 4G (to reduce power consumption) and you have a relatively future proof phone for when 4G comes to your area. My area is one of the 5 AT&T cities getting LTE this summer, but even if I wasn't, considering most people do 2 year contracts...it makes sense to be able to access the LTE near the end of your contract.
Just considering the prominent rumours surrounding the upcoming iPhone, and adding my own two cents to what I feel is realistic:
-8 megapixel rear-facing camera (rumoured)
-HD-capable front-facing camera (roughly 1 megapixel produces 720p footage)
-thinner profile (rumoured)
-better looking device (expected... come on, it's Apple; when was the last product upgrade an aesthetic downgrade?)
-larger screen (rumoured)
-increased or same battery life (this has been the trend for every iPhone since that between the original and 3G - I don't recall whether this was the case for that generation jump)
-faster processor, or more RAM (just a guess)
Taking into account the fact that the iPhone 3G came out ~3 years ago, and that the 3Gs came out ~2 years ago, I think there will be many people who, on these features alone, and the fact that their contracts are due to expire shortly (or already have), will move to this coming generation of iPhones. Fast forward another year, and if and when LTE catches on in a major way, Apple will announce the iPhone 5s, or 6, whatever you want to call it. The iPhone 3Gs users remaining will
definitely be ready for an upgrade, and the iPhone 4 users will think to themselves that the device still has many similarities, but that LTE is a feature worth upgrading for, especially when they look around and see how widespread it is.