Awesome post, very interesting
At this cost point, this will attract lots of hobbyists and educators to linux.
I am thinking through ideas myself for some projects to play around with at home.
At 5$ I’m thinking of using these as a video interface for other devices.
I can use one to add HDMI video/audio to any embedded system.
I can feed it almost any sort of data like I2C. 1-wire, serial, canbus, ...whatever, and get a video display with sound... great for debugging among other things.