Wow, that's improved amazingly in quality since the last time I saw something similar. Then, the 'reconstructed faces' were blurry blobs that were barely recognizable as faces. These are great.
It's an apples-to-oranges comparison though. These researchers generated 2000 faces. It sounds like from there they essentially did nearest neighbor search to find the predicted face. It's still impressive (and accomplished what they wanted), but it doesn't solve the problem of recreating the images from just the brainwaves.
From the article "In fact, they were nearly indistinguishable from the actual photos shown to the monkeys." It doesn't really sound like they did that.