Apple Inc.'s iPhone 4S doesn't have a larger screen or 4G speeds or a redesigned case, and its biggest problem is it's not iPhone 5.
Actually, iPhone 4S does have 4G technology, but it is just not the fastest of its kind in the U.S. The iPhone 4S will use HSPA+ 14.4 with average speeds of 1.5 to 2Mbps, but it is a fourth-generation bandwidth technology. In comparison, Verizon offers a 4G LTE network that can average 10Mbps downloads.
Apple may be waiting to put LTE speeds into iPhone 5 because that network causes quite a drop in battery life. Apple products are known to have good battery life, and, in 2012, mobile batteries may be caught up to the point where the company is comfortable using them more aggressively. Batteries might even be a bit smaller so they can fit into the ultrathin iPhone case.
Additionally, Apple could be holding off on iPhone 5 because the company wants to let 3GS users upgrade to iPhone 4 or iPhone 4S.
There is also the question of how well Siri is going to work. It appears the voice-recognition software was the cornerstone of the iPhone 4S launch, but similar programs already exist, and they all have plenty of problems in understanding what you say. If Siri can still hear you with lots of noise in the background or can understand you with a thick Southern accent, then it could be ready for the iPhone 5 in 2012.
By then, the anticipation for an actual case redesign with tons of new features and technology, like a larger screen, will have built up again, and this time Apple won't disappoint.