Final answer:
HomeGroup in Windows 7 is the Control Panel feature that allows for easy media streaming across a home network, enabling the sharing of pictures, music, and videos with other PCs in the HomeGroup.
Step-by-step explanation:
The Control Panel item that allows for easy streaming of pictures, music, and videos to other Windows 7 PCs is HomeGroup. This feature enables users to share media files across all computers that are part of the HomeGroup network. When you set up a HomeGroup, you can choose what to share, and you can also stream media files to devices and other PCs. It's an efficient way to distribute content throughout your home network.