Well, that may or may not be true, according to where you like to get your studies. A new from the NPD Group says the rate at which is declining.

NPD's research into the usage habits of iPad owners comes up with the revelation that only 14 percent of early iPad owners have in favor of the new gadget. And that number is dropping, with just 12 percent of users who bought their tablet after the holiday season kicking their PC to the curb.

NPD makes the argument that while PC sales are down, the biggest spot for computers is in the sub-$500 laptop field that stands to lose the most to tablets. Such machines grew by 21 percent over the last quarter of 2010 and the first quarter of this year. Meanwhile, sales of Windows consumer notebooks over $500 dropped by 25 percent.

So, while NPD agrees that laptop sales are down, it suggests you shouldn't point the finger at the iPad. Instead, the research firms suggest that PC sales simply aren't succeeding in keeping pace with the halcyon days of computer refresh caused by the launch of Windows 7 and the emergence of the netbook as a powerful new category--two big factors that led to computer sales going through the roof.

In fact, the researcher says that 75 percent of those who purchased a tablet did not plan to buy any new technology over that timeframe, suggesting that "iPad sales added billions of dollars to the industry's coffers after years of [average selling price] declines draining the market." It's hard to argue that the iPad probably does carry better margins than does the netbook--it is from Apple, after all.