The page is titled "One Pot, Two Lives" (click the title for the link) and is a fish tank and flower pot all in one. The fishy's waste feeds the plant while the plant filters the fish's water. You still have to feed the fish, but there doesn't look to be a whole lot of nasty fish tank cleaning involved.
It also does look like it needs to be plugged in, probably for a bubbler to keep the fish water moving. Hopefully it would be a simple fix if it broke and wouldn't need to be thrown away if only part of it broke.
It's not specific as to if certain kinds of plants are preferred over others. It would certainly be an awesome thing to have in a small apartment like the one I live in. Surfing through the comments, it seems that the only fish that would work in a small environment like this would be a beta fish or a goldfish. No one knew if there was a heater in this product, but both of those fish don't need one because they're okay with colder water temperatures. Of course, most of the debate centered around if it was "cruel" or not to keep a fish in such a small container. But I say that's up to the individual to decide. The concept is, however, a really cool one. It would be neat to see if this could be made into something a bit larger, possibly on the size of a regular fish tank with multiple fish and plants.