Could Windows 8 let you call and text your relatives directly from your a tablet? That’s what some new evidence suggests, as istartedsomething discovered that two videos from Microsoft’s Build developer conference have a variety of references to calling. You can see a ”Missed calls” tile on the home screen in the picture above, and in a second video, there’s a contact info screen with options to “Text and Chat” (including SMS) as well as the telling “Call mobile.”

Although, all of this evidence could be explained in a variety of other ways. For example, SMS is explicitly called out as a “fallback” option in a video describing Windows 8′s integrated messaging app, which could mean that Microsoft is just simply extending the current SMS for Windows Live functionality there. Perhaps, like the sync functionality in HP’s Pre 3 and TouchPad, you’d need to have a Windows Phone 7 device paired and physically next to your Windows 8 PC to make or receive calls and text messages. In fact, with Windows 8′s focus on cloud sync, notifications might not be any more than that — your Windows Phone 7 device could simply pass a note to Windows 8, via the internet, that there are some telephone duties you should get to. Still, the inclusion of “Call mobile” leads us to think there’s something more here — assuming these aren’t all mockups, anyway. Also let us not forget the Microsoft has also purchased Skype. So the integration could be their using that platform.