You can’t blame the makers of IMAX films for wanting to get in on the home video game. That’s where so much of the money is these days, and the large-format films are pretty expensive to make, even if they command a higher ticket price—plus they’re limited to a smaller number of screens. That said, watching IMAX movies at home is kind of a de facto goofy proposition. The little intro to IMAX Under the Sea, now out on DVD and Blu-Ray, implicitly acknowledges that with its boasts of “The world’s largest screens… 12,000 watts of digital surround sound…” Dude, I’m in my living room. Kind of rubbing it in.

That said, Under the Sea is a pretty amazing-looking movie, with bright, colourful footage of incredible sea life in coral reefs around Papua New Guinea, Australia and Indonesia. These are some crazy Technicolor lifeforms: indescribable, colour-shifting, alien-like cuttlefish, ancient-looking nautiluses, a field of garden eels planted upright in the sand and swaying softly, like an Yves Tanguy painting come to life. While the visuals are gorgeous, the sound design is distracting, with lots of too-loud, fake-seeming sound effects and goofy narration by Jim Carrey. Also, being an IMAX film, the damn thing’s only 41 minutes long, so not exactly the best bang for your buck. But there are worse things to watch on Earth Day, I guess.

Two flawed but interesting Tom Cruise vehicles make it to Blu-Ray this month. Steven Spielberg’s Minority Report really disappointed me when it came out, though in retrospect I really did enjoy the first half of the movie, before it descended into generic double-cross thriller territory. One thing that really stands up (with a couple of exceptions) is the movie’s vision of the future, where fancy technology co-exists with older architecture, instead of it all being shiny and new. The other is Michael Mann’s Collateral, again flawed by some generic genre-isms but a gorgeous exploration of digital video night-time camerawork.