Virtual machines have been around for years, but it's only been in the last couple of years that performance on them has become good for regular and productive use. When Apple made their big switch to Intel processors, an upstart company named Parallels came along and did what seemed at the time to be the unthinkable: they created a virtual machine environment in OS X that allowed users to run Windows at virtually full speed.

Of course, veteran virtual machine company VMWare apparently took notice, and although they were later to the Mac virtual machine game, they arrived with years of experience behind them. Today, it's a toss-up as to who has the better product - and that's great for consumers. We're in the position of being able to watch a horse race between two very capable and competitive companies, and that means that performance and features are going to continue increasing at a rapid pace on both platforms.

VMWare has recently upped the ante with the release of VMWare Fusion 1.1, their aforementioned Mac virtual machine platform. As reported by our sister site TUAW, the new version of Fusion comes with Leopard support, experimental DirectX 9.0 support, full Vista and XP support, a beta version of VMWare importer, and overall improvements to speed and performance.

Parallels, it's your move.