Thanks for the info. ;(
A lot of Ikeas seems to have jumped the gun and put all the range up for sale already - the Oakland & East Palo Alto Ikeas in California both have (or had) them last weekend.
The spot lights have a sound-sensitive setting, and various dimming/pulsing modes. The LED matrices just change the pattern. Opening them and making them Bluetooth - or zigbee? - controlled would be a great mod.
One note though, I had to exchange one LED matrix because it just didn’t power up, and one LED spot light because it made a strong buzzing sound whenever it turned on, so QA doesn’t seem to be awesome, especially for this price range ($30 to $40). But when it works, it’s really cool.