Tablet sales are continuing to swell, but despite the entry of new challengers, Apple still has a commanding lead.
IDC estimates that tablet sales climbed 88.9% sequentially in the second quarter. Sales had also grown over 300% compared to a year ago.
Apple's iPad 2 sold some 9.3 million units during the quarter. The company's share of the worldwide market grew to 68.3% in Q2, from 65.7% a quarter earlier.
RIM only managed to carve out a 4.9% share of sales with its PlayBook tablet. The company's gain appears to have come at Google's expense – Android's collective share of sales fell to 26.8% from 34%.
IDC predicts that Android's share of the market will fall even further in the current quarter, but then start picking up again in Q4.
Due to the $99 fire-sales of HP's TouchPad tablet, WebOS' market share is meanwhile expected to climb to 4.7% in Q3, but then fall back to zero by the first quarter of next year - unless HP develops a clear plan to license or sell the OS to other vendors.
Apple may also finally cede some share in the market, with IDC forecasting its share will fall closer to 50% by the end of the year.