Surely creating them from a simple microcontroller will be impossible! Not according to [techtoys], who has created an Arduino shield that creates an HDMI output from an SPI control input.

Image by bigthink Via The Hardware Hacker's Introduction to Microcontrollers, Part One: Anatomy of an Arduino on fear-of-lightning.wonderhowto.com.

Using the Arduino microcontroller, we will explore some of the essential and useful electronic sensors (light, sound, motion, sonar, infrared, angle bending), powerful actuators (relays, motors, ...

Intel's Curie-based Arduino 101 Programmable Microcontroller development board goes under the microscope today to see exactly what it brings to the table.

That link also contains listings of workshops using the Shrimp microcontroller. Since it appears just like an Arduino Uno you can do any of the hundreds of projects for that board.

Microchip and Digilent today announced the chipKIT™ platform--the first 32-bit-microcontroller-based, open-source development platform that is compatible with Arduino™ hardware and software.