The Microchip website says, "Ideal for Graphical interface applications that can benefit from the integrated Graphics, 96K byte RAM for frame buffer, mTouch, USB and other peripherals."
They are about $8 dollars per chip which may be a bit pricey and the chip may be cheating in terms of creating video for you instead of trying to do it all yourself.
The datasheet is here:
http://www.microchip.com/wwwproducts/De ... e=en547869
The graphical features are:
-from the datasheetGraphics Controller Features:
• 3x Graphics Hardware Acceleration Units
• Color Look-up Table (CLUT) with Maximum of 256 Entries
• Direct Interface to Monochrome, C-STN, TFT, OLED
• Resolution up to 640x480 @30Hz, 16 bpp, or 480x272 @60Hz, 16 bpp
I found out about it from 6502.org (Programmable Logic Forum) because other users use Microchip devices. They also found this thread to be interesting in creating video: