New to iOS 5 is a function I haven’t yet seen in the beta operating system; from what I read on our live-blog of the Apple event, Siri Assistant wowed the audience. Near as I can tell, only the new iPhone 4S will be able to use Siri, because only the new phone has the A5 dual-core processor and perhaps enough RAM to make Siri work. Here’s an official Apple demonstration video of Siri:
As far as the iPhone 4S itself, all the hardware changes are on the inside. Among the more prominent upgrades:
Apple’s A5 dual-core processor
8-megapixel backlit illuminated camera sensor with f/2.4 aperture and 1080p video recording
World phone with CDMA and GSM support, including a 14.4 Mbps HSPA+ radio
8 hours of talk time; 6 hours of 3G talk time; 9 hours of Wi-Fi browsing; 40 hours of listening to music