Apple will announce its next-generation iPad at a special media event scheduled for Wednesday, March 7, according to a new report. Citing sources who have been reliable in the past, iMore reports that the device will feature a 2048x1536 Retina display, a quad-core Apple A6 system-on-a-chip, and “possibly” 4G LTE wireless data capability. The latter feature was later confirmed by the Wall Street Journal, which claims that both Verizon and…