I don't get why people say this. When the iPhone first came out, it only supported 2g (even though my cheap flip phone could do 3g!), app store was only just starting, and quite a few features were behind what were already available on other phones (it didn't even have GPS!). Apple has never actually "led the way" with features, but with the whole user experience. The Apple ecosystem is really what makes a difference.
The main feature that set it apart was the capacitive touchscreen. Now that everyone else has copied it, what do you think they need to do from a hardware perspective? Faster processors? They already do that every release. Larger capacity? Original iPhone maxed at 8GB. Now we have 64, and talk is that next may include up to 128GB. Add slot for more storage? Sorry, takes up too much room, and it's doubtful they will ever offer this option. Plus it takes away from battery life, and that is something Apple is always careful about. They waited to add LTE until a low enough power chip could be used. Again, Apple has never really led the way with certain features, and likely won't unless it can be included to enhance the users experience.
rant
The fall in stock price is completely due to the idiot analysts that really should be fired for coming up with completely unrealistic numbers that they are obviously pulling out of thin air. They keep on spouting their crap, and people think they are "in the know", when a monkey could come up with numbers by picking them out of a hat. Then they panic when Apple doesn't meet the "analysts" expectations (completely forgetting that Apple beat THEIR estimates) and dump the stock. Apple posted a huge profit of over $13 billion in ONE quarter, and the stock tanked because "analysts" said they didn't sell as many phones as "they" expected! Really?!?!?!?! /rant
Sorry for the long post.