Source: Verizon Wireless
quote: I'd argue that moving from cheap TN panels to IPS for wide viewing angles and color accuracy and being able to push past 300 dpi was a major change from the original iPhone. I don't think anyone would confuse the display between the original iPhone and iPhone 4/4S.What was probably the major innovation post-iPhone launch was the App Store. Previously, the carriers controlled development access to mobile phones so one middle-man was eliminated. Ability to self-publish, flexible pricing, and a well defined distribution channel were all major changes from how things were before. Apple taking a stand against carrier bloatware and Apple offering a consistent stream of OS updates are also noteworthy differences to how most smartphones operate.