The next version of Mac OS X is code-named "Snow Leopard," and will indeed be Intel-only, we have learned. This info is hot on the heels of TUAW's original scoop about Mac OS X 10.6 being readied for shipment as soon as Macworld 2009 and being Intel-only.

People familiar with the situation have confirmed to us that TUAW's details are true—Snow Leopard is currently on track to come out during next January's Macworld, and it will not contain major OS changes. Instead, the release is heavily focused on performance and nailing down speed and stability. With Apple's current (and future) focus on smaller, thinner, and more mobile devices, this move makes perfect sense. Things like the MacBook Air, iPhone, iPod touch, and other mysterious devices that have yet to be announced need better performance for better battery life, and that's definitely something Apple wants to excel at in the years to come. Our sources did not note whether Apple planned to discuss Snow Leopard at this year's WWDC.

Something else that may happen is that Apple may eventually wrap everything in Cocoa—things that are currently only Carbon accessible will be no longer. This (which is reportedly not yet in stone) should make many Objective-C programmers happy, although those who are married to Carbon may get a bit bristly at the news. (Note: There may be some disagreement here as to what exactly "Cocoa-only" means, so take that into account when thinking about this. For example, Apple may only axe Carbon UI stuff.) Of course, it seems like 10.6 is all about making graybeards bristly, as PowerPC users will soon be left out in the cold too.