Apple has a habit of doubling things. The first iPhone, for instance, had 128MB of RAM. When the 3GS rolled around, that number bumped up to 256MB. The big question was whether or not Apple would do it again, especially with the iPad still fresh on shelves — and containing a 3GS's worth of RAM. The iPhone 4 has double, and one little word makes it all the more exciting:
The iPhone 4 isn't even out yet, but it's already proven wildly popular. If Apple wants to keep that momentum, it's got to keep giving consumers a reason to say, "Wow!" Sure, apps will be snappier on the iPhone 4, but now the stakes have raised. With their aging hardware, the 3GS and the iPad won't be able to deal with several apps at once as well as the iPhone 4, which makes it all the more attractive.
We'll just have to wait and see until the release of the iPhone 4 just how much that extra RAM helps. Will the average user even notice, or will the iPhone 4 totally blow it's predecessors out of the water?