Apple is no stranger to its competitors taking shots at its work. Some of them are downright hilarious. But at least they're usually fair comparisons. Amazon took yesterday's announcement of the iPad Air as an opportunity to subtly dig at Apple and promote its Kindle Fire HDX tablet.
You can see the ad above. What the ad doesn't say is that the Kindle Fire HDX is lighter than the iPad Air because it isn't the same size as the Air. The Fire HDX indeed is lighter than the Air's one-pound weight, at 0.82 pound. But it also features nearly an inch smaller screen, 8.9 in
