By letting you send iMessage texts using a client for your computer, Apple could solve one of today's most annoying problems: typing out text messages using a tiny virtual keyboard when we often have a full-sized keyboard right next to us.
(Ellis Hamburger, Business Insider)
People don't as yet realise how huge the disconnection of SMS from voice networks is going to become. By integrating iMessage seamlessly in iOS5, where you don't even need to know you're using it, let alone install anything, Apple's approach is nothing short of genius. Extending it to Macs will be a huge step in the same direction. And when voice itself follows—which, as the Republic Wireless launch demonstrates is already happening—and becomes mainstream, the final nail in the coffin of the old telco monopolies will no longer be that far away.