You’ve gotta love the innovative Japanese! They never cease to amaze me with the interesting stuff they come up with.
Although the use is innovative, it isn’t much of a big deal, really, unless they’ve managed to integrate a self-contained power unit that should be expected to last for centuries.
What’s been done here is the equivalent of embedding a digital photo frame (can be had for less than a hundred dollars) into a tombstone.
Anyway, nice!