It's been proven many times over that Apple's innovations go a long way toward mapping the future of mobile devices. Two elements of the new iPad are important to think about within that context.
The new device features a high-definition QXGA display that is 2048 x 1536 pixels, according to DisplaySearch. That means it features about four times as many pixels per inch as the previous iPad. The firm reports that Apple is accomplishing this via Super High Aperture (SHA) design.
The piece quotes Apple as saying, essentially, that when you squeeze too many pixels into a small space they get muddled up (though the quote is a bit more precise). The piece then takes a stab at explaining how SHA solves the problem:
SHA is a method of increasing aperture ratio by applying approximately a 3 m thick photo-definable acrylic resin layer to planarize the device and increase the vertical gap between the ITO pixel electrodes and signal lines.
That explanation and an accompanying diagram suggest that the idea is that the new process uses a coating of organic film to focus the light from the image more directly upward. That, apparently, avoids the problems when the energy is distributed in a more diffuse manner. The process, which was developed by JSR and Sharp, hasn't found wide use due to expense and design challenges.
Kent German at CNET goes over these two new elements. He also discusses the use of LTE and the processor. His vantage point, however, is to use the new iPad as a set of tea leaves to predict the attributes of the next iPhone.
The new battery seems to have been benefited by being physically bigger - not by any internal innovation - while the iPad display uses technology that, while not new, is being widely commercialized for the first time. The bottom line is that Apple is doing enough to stay ahead of its competition.