The word "Microsoft" would be in the URL of the website.
It's alright though!
But apparently though, Microsoft is hoping to make coding between the different platforms very easy than it is already. It's already possible to take a Windows Phone 8 app and recode it within a few weeks to have it run well on Windows 8. MetroTube for example (best youtube app out there on ANY platform, strongly recommend downloading it for Windows Phone and Windows 8) announced a month ago they were releasing a Windows 8 app. Literally in about two weeks, it was already published in the Windows Store. Weave, a very excellent news reader app on Windows Phone, announced they're working with the MetroTube developers in releasing a Windows 8 app version of it. USA Today also have Windows 8 and Windows Phone 8 apps. There are several other apps from Windows Phone that have made to Windows 8 because of that ease of recoding.
You just need to keep a lookout of what apps from Windows Phone are making it to Windows 8. One simply cannot take a Windows Phone and blow it up to a larger screen, the User Interface needs to be changed to adapt to the screen among other things.
By the way, what Windows Phone do you have?