He said it has about 10 hours of battery life.
Apple said it would start shipping the Wi-Fi version of the iPad, which has a virtual keyboard but can also dock with an external keyboard, in late March.
Enderle believed iPads could also pose a threat to hand-held gaming systems and eventually videogame consoles.
Dressed in his trademark blue jeans, black turtleneck and sneakers, Jobs walked around the stage and sat on a couch at the Yerba Buena Center for the Arts Theater as he unveiled the hotly anticipated gadget.
“If you are thinking about buying a Kindle, you are probably reconsidering that decision. If you are a developer, you have one more reason to develop applications for Apple,” said Interpret analyst Michael Gartenberg.
Jobs said he expected the device to carve out a place between the laptop computer and the smartphone.
“We want to make something that combines the best of print and the best of digital,” Times digital operations vice president Martin Nisenholtz said as he showed off an early version of an app for the device. “We are incredibly psyched to pioneer the next stage in digital journalism.”
“We are going to be able to bring all of the other great EA games for the iPhone from the App Store to this device in no time,” said Travis Boatman of EA’s mobile studios.
Besides serving as an e-reader, the iPad runs almost all of the applications available through the Apple App Store for the iPod and iPhone.
The iPad is “so much more intimate than a laptop and so much more capable than a smartphone,” he said.
Jobs said the iPad has support from five big publishers and Apple will “open the floodgates for the rest of the publishers starting this afternoon.”