DrBubbaI think this kit is more about the DIY experience than the final product. The final product is cool looking and can be an interesting conversation piece, but it seems secondary to the fun of the build in this case.
DrBubbaMostly what @thisisthesongisingforattention said. It's a fun way to introduce some beginner electronics and coding to either yourself or someone you want to get into it. Put it together, run the demo script and see the colors then you can play around with the code and get immediate visual feedback based on tweaking various bits. I like to think of LEDs as the gateway drug to DIY electronics.
That said, it's still an Arduino at its core so I have no doubt you could hack it to make the cube flash different colors for received email or maybe respond to weather reports. You could maybe simulate rain drops or something if the weather called for rain. If some real intrepid coders posted some fun projects I would love it.
DrBubbaPersonally, I was going to see if I couldn't hook it up to a daemon that regularly checks stock performance and associate each light of one layer with a given stock (perhaps allocate each layer of the cube to a specific sector of the market?). Alternatively, I was thinking about bringing one into the office and associating each light with a server's heartbeat/usage (white/blinking: offline, blue: online / idle, green: online / 10%<=utilization<30%, yellow: online / 30%<=utilization<50%, orange: online / 50%<=utilization<70%, red: online/70%<=utilization<100%). I bet it'd make a really nifty music visualizer as well, come to think of it.
But hey, worst case scenario it's a conversation piece, right?