From PC World: A year after it was first announced, the Raspberry Pi touch display finally launched on Tuesday. The new component means Raspberry Pi hackers can now experiment with an officially sanctioned 7-inch, 800-by-480, 10-point multi-touch LCD display for their Pi projects.
The $60 touchscreen does cost more than the Pi itself, but that comes down to component costs.
The screen uses a display serial interface (DSI) and digital parallel interface (DPI) that requires a driver board to interface with the Pi. The display also requires its own power connection, which can be shared with the Pi over USB.
The connection between the Pi and the driver board relies on the DSI interface leaving the Pi’s HDMI port free to power a second display. You can read all about the display adapter decisions on the Raspberry Pi Foundation’s blog.
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