I was surprised to see they're still using the goofy PenTile display stuff. The device is the display, you can't skimp on that.
From what I've read so far, the PenTile technology is used to achieve a brighter screen at lower power consumption with a minuscule loss of precision.
LG makes displays for the iPhone and older iPads. The "retina" display for the new iPad is produced by Samsung.
Full Disclosure: I'm the CEO of Nouvoyance, the company that develops PenTile.