Update: According to WPDang, Microsoft is reportedly modifying its WP8 "to support screen capture through the Windows key and camera button". Like it is on iOS and Android 4.0 and above, screenshots will be saved in the dedicated gallery on the device. In this case, it would be saved in the Photo hub.
With Windows Phone 8 getting removable microSD storage support, allegations that the ability to plug your WP8 phone into a computer to transfer files will be supported has been making its rounds around the Internet. WPCentral further confirms this, and comments that Microsoft has spoken to them and other media "about this on and off the record" before its Summit event and even mentioned it in a video:
WPCentral - "Second, you can just watch it for yourself when Joe Belfiore briefly discusses this feature at the 14 minute mark in the Summit video:
“We introducing removal micro SD support as a core part of the platform and this core micro SD card support spans both the PC and the phone. The scenarios are both valuable to consumers but also to developers and even hardware vendors.
What this enables that’s different than what Windows Phone 7.5 has today is that an end user can add a micro SD card months after they buy the phone expanding their storage and then they can use it to transfer contents between their PC to their phone, from phone to phone, it can be used a distribution vehicle for apps and it supports all of things in a very natural, integrated way in the Metro experience."
However, the mass storage support will only allow you to access your micro SD card but not the phone’s internal memory for security reasons. Nonetheless, the ability to simply drop files into the expandable storage is better than having to do it via the Zune software.
Sources: WPCentral via The Verge, WPDang via The Verge