There's plenty of innovation on Apple's Macintosh, where tools like VMware Fusion and Parallels Desktop blend Windows applications with the OS X desktop hiding the virtual machine from the user.Microsoft's MEDV (Microsoft Enterprise Desktop Virtualisation), uses similar techniques to deliver managed applications to Vista users with centrally managed desktops run on local virtual machines. Desktop virtualisation tools are less common these days, though VMware's Workstation soldiers on, along with Microsoft's free Virtual PC. Things get more complicated when it's desktop applications that need to be kept running. All you need to do is fire up a virtual machine manager, install the appropriate server OS, and then install the applications you need. Old software may not be compatible with your new systems, and the compatibility tools built into a new OS may not be suitable for your older software.It's not such a big problem with server software.
That's a problem if you're planning any major system upgrades, especially if you're rolling out a new OS release or deploying new hardware. There's a lot of legacy software out there old applications that still run your businesses.
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