NEW YORK » Apple is expected to reveal a new iPad model today, with a sharper screen and perhaps an option for faster wireless broadband. The upgrades are relatively minor, but the iPad is secure in its position as the king of tablets.

Some of the rumored new features include:

» A sharper screen, similar to the "Retina Display" on the iPhone 4 and 4s. The rumored resolution is 2048 by 1536 pixels, which would make text look smoother and some high-resolution pictures look better.

» The new iPad could include Siri, the voice-activated "assistant" found on the iPhone 4S.

Siri has gotten mixed reviews, but Apple has been touting the feature heavily in its advertising, and it would make sense to expand the availability of this high-profile feature.

» Faster wireless capabilities. IPads are available with built-in modems for AT&T’s and Verizon’s third-generation, or "3G," cellular networks in the U.S. The iPad 3 could come in a version that offers faster "4G" or "LTE" networks. However, most iPads are used only on Wi-Fi, so an "LTE" chip wouldn’t matter to most buyers.

» A faster processor. This is pretty much a given, because every new iPhone or iPad has improved on the computing power of its predecessor.