Some additional assembly required
Keep in mind that older hardware simply won't include some of the hardware conveniences being included inside new Windows 10 machines. For example, Windows Hello, which logs you into your PC by recognizing your face or your fingerprint, won't work with a webcam-you'll need a new depth camera (like a Kinect for Windows orIntel's RealSense) to enable it, or a fingerprint reader. Speech recognition will work best with a high-fidelity microphone array, no surprise there. And there's a whole host of nitty-gritty specifics that Microsoft has included for Windows 10 Professional, such as a requirements for BitLocker and Wi-Fi Direct Printing.
In general, however, it seems like your pre-Windows 10 checklist will be pretty short: Sign up for a "reservation" for Windows 10, back up critical files, and keep an eye on your antivirus subscription as the transition takes place. Chances are we'll be upgrading at the same time, so you can rest assured that we're all in it together.
Updated at 2:51 PM with Microsoft's Windows 10 retail pricing.
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