With the major Windows Phone 8 ‘Apollo’ update on the horizon, speculation has been abound that its most major software-side change is with a kernel switch from CE to NT. With that in mind, WMPowerUser stumbled upon something interesting: I’m a WP7, an app which lists all of the build numbers of the OSes that users install the app on, has reported that 1% of people who use the app are running it on Windows 8 build 6.2.8283.0; essentially, this shows that someone is running this Windows Phone app on a desktop Windows 8 machine.

WMPowerUser speculate that Microsoft are going to allow Windows Phone apps to run on Windows 8, essentially giving the tablet marketplace a 70,000 (likely unpleasant to use) app boost, and the information we see reported by the I’m a WP7 app is of them doing internal testing of this functionality. Something worth noting is the mention of “Jupiter” in the I’m a WP7 app, which, as we know is essentially the codename for the Metro, “Immersive”-style app ecosystem in Windows 8.

This of course backs the credible rumors we’ve seen that suggest Windows Phone 8 and Windows 8 will share many of the same components, allowing for easy app ports across the two platforms (and apparently the ability to seamlessly run Windows Phone apps on Windows 8 itself.)

With both Windows Phone 8 and Windows 8 slated to launch later this year, it will be interesting to see how consumers and developers alike react to Sinofsky’s new “one Windows” vision when it hits the shelves.