A teardown of the fourth-generation iPad shows very few differences inside or out, notes iFixit. As advertised it upgrades to a 1.4GHz A6X processor, a 1.2 megapixel front-facing camera and a Lightning connector, but many other design traits are essentially unchanged. The tablet still uses a single speaker, unlike the twin speakers in the iPad mini, and even embeds the Lightning connector in a frame the same size as the one for the third-gen iPad's 30-pin dock.
The teardown unit
does use an LG display, confirming that Apple is starting to turn to companies beyond Samsung for panels. Samsung is, however, likely supplying a fair share of panels, just not all of them. As before, the touchscreen controller hardware comes from Broadcom.
The fourth-gen iPad is officially launching today, alongside the iPad mini. It's unclear if or how Apple might update the full-sized iPad in the spring, as it usually does.