LEGO

Personally, I'm not a fan but it's like all art. Some people like it, others don't. It's like the wall art version of Spiderman which I think just looks a little odd, but there's obviously a market for these kind of sets.

The choice to make it out of miscellaneous parts rather than the 1x1 round plates or 1x1 round tiles found in most mosaic sets makes it look like Lego just wanted to get rid of the parts that they had sitting in surplus. Even shaping the details with wedge plates such as in The Rolling Stones (31206) set, or a mix of 1x1 rounds and wedge plates such as in Hokusai – The Great Wave (31208), would look much nicer and less slapdash.

I love it, might grab it in the future. I built the painting of Darth Vader which only has the round 1x1 buttons and it was oddly relaxing to build, albeit completely different than any other build I've done before. This one with far more complex pieces might be quite fun in yet a different way.

is that supposed to be Voyager on the bottom left?

As a fan of almost anything space or sci-fi, I love this. And I think the parts usage is fine too. I was reading a review of it online and they pointed out a few details in the set like a couple satellites, an arrow piece that says "YOU ARE HERE" and such.

I love Lego, but that doesn't look like much fun to build.