Apple already shrunk down the SIM in its iPhone 4 adn iPad, using a micro-SIM to save space. But apparently even that micro-SIM is too big for Apple, who wants and even tinier SIM to take hold in even tinier gadgets.
Apple is pushing for a new industry standard for SIM cards, one that would be super small in order to save space in a next generation of ultra-thin phones and tablets. They submitted an official proposal to the ETSI, and if approved they could start making the new SIMs relatively soon. And hey, anything that makes it easier to make thinner phones is OK by me.