Shipments of Apple's iPad mini are expected to tank during the second quarter as consumers hold out for the second generation version of the device. Shipments are expected to fall as much as 20 to 30 percent according to DigiTimes, which cited upstream sources in Apple's supply chain. That represents 10-12 million iPad mini units shipped for the second quarter of this year.

Apple said it shipped a total of 22.9 million iPads during the first quarter of this year, although the company did not disclose how many of those were iPad mini units. DigiTimes estimates 15 million units out of the 22.9 million total iPads shipped were iPad mini models, which means the drop-off during the second quarter could be anywhere from 3 million to 5 million units. Apple's goal is to ship a total of 55 million units of its smaller iPad this year, although we imagine many consumers will instead flock to the newer, second generation device once it hits the market.

The latest rumors suggest the new iPad mini will offer a Retina display and we suspect a faster processor and other tweaks will be added, too.