Back in what seems like the dark ages Apple computers only ran on IBM-developed PowerPC processors, before a switch was made to Intel soon after the release of the next release of OSX (version 10.6 to those counting), codenamed Snow Leopard looks set to cut those legacy ties, if screenshots from the early build available to developers are anything to go by.
Of course it's early days yet and between now and next year's release Apple could well build PPC support into Snow Leopard, but considering no systems requiring it have been made since 2006 when the first Intel-processor fitted MacBook Pro was released. Certainly not having to spend time on testing programmes via Rosetta (Apple's PPC emulator) should cut development times for Snow Leopard - or at least allow more time to be dedicated to arguably more useful areas.
All things considered, I can't see many people being upset by this information. Even those people who are still running PPC Macs will likely have upgraded before Snow Leopard's release, or will be happy to upgrade for it. Given the likely power requirements of the OS, even some older Intel systems aren't likely to run it at its best. Ah, progress…