Our previous announcement was for Windows 8 support. This adds support for Windows Phone 8 (whose SDK came out after we launched the Windows 8 version) as well ;)
I get Windows 8 and Windows Phone 8 confused all the time (I'm not being sarcastic here, even though it might sound it - I genuinely do! The names are too similar).
As a developer, it also doesn't help that Microsoft made a lot of noise about them being on the same kernel, even though there's hardly any API overlap between them.