The new iPad could take the touch screen to a new level.
Speculation is mounting that the Apple tablet will include a 'haptic' display that allows users to 'feel' on-screen objects.
Finnish company Senseg has confirmed that it has talked to tablet manufacturers about its e-sense technology, though it refused to comment on whether Apple is a customer.
But the addition of texture would fit with the wording of the invitation sent out by Apple to an event later, at which it is expected to launch the iPad 3.
"We have something you really have to see. And touch," it read.
The Senseg technology works by generating an electric field from elements build around the screen.
So-called 'tixels' make different parts of the screen feel rough, smooth or rounded, depending on the image.
The new iPad is also likely to have an HD display, with a resolution of 2048x1536 pixels.
That's four times the sharpness of existing models, though not quite as sharp as the iPhone's Retina Display.
Technology blogs have speculated that the new device will come with upgraded cameras, a longer-lasting battery and possibly a fast quad-core processor.
It will almost certainly have Siri, the voice control software first included on the iPhone 4S.
