If you get to the inlined video and think it looks a little sluggish, keep reading - they later implemented DMA to speed it up. Here's the link to this video showing it: https://youtube.com/watch?v=dkBwNocItGs
Of course a snappy interface is always more important than visual flair, but I imagine this is more a tech demo than anything else.
Which is why they often also offer 8 bit serial interface. I guess one can use it with the PIO on rp2040.
Edit: whoops it's only 320x240. Not sure how fast are they are running it.
https://twitter.com/charlesstrahan/status/163002622435647488...
Now, admittedly, this is 600 MHz beast (the NXP i.MX RT1062). But I’d like to think it’s still impressive for the hardware involved.
As mentioned in the Twitter thread, to eke out the performance I had to implement an 8-bit parallel bus using FlexIO along with DMA (all written in Rust) — but with that implemented, the display is pretty zippy.