Unscientific, immoral and macabre
Convolutional neural networks are primitive statistical models - the neural network of the mouse is a few orders of magnitude of greater complexity and there is no serious attempt to duplicate it or model it, only to use it as an input. Using the notorious ImageNet database of 5100 stolen images, they downsampled them to 64x36 pixel grayscale - then through a ~200 um window into the head, they used a TPSLM to observe the neuronal activity (light flashes) in GFP-M genetically modified neurons in the visual cortex - but they have no way to measure or model the connectivity of the neurons, each of which connects to thousands of other neurons. This is like attempting to determine which TV shows are popular based on the output of a webcam pointed at a block of apartment buildings, observing the timing of light switches in each apartment. The equipment they are using have been previously used to determine the structure of the mouse visual cortex, but they are not trying to replicate the structure of the mouse brain here, they are just doing black box engineering.
It is immoral to use animal brains for engineering purposes (I felt severe distaste with the K9000 cyberdog gun in the Fallout: New Vegas game - which has a dog brain to select targets) This study is completely depraved, careless, contemptuous of the value of life. These sadists propose to further expand their operation.
Apparently the animal ethics committee of Baylor has not the least regard for life and will rubber-stamp any animal study. Animal ethics committees are supposed to weigh each case and determine if the death (to whom?) of animals has a significant positive benefit to humanity - the vast majority of animal experiments at universities are unscientific as they do not make an attempt to ensure that the mechanisms studied are the same in people as in animals - extensive genetic testing and careful simulation is needed, and that is infeasible; when you have thousands of grad students all required to produce paperwork to earn grant money, you can't do things at a high standard. There are 100,000 cages containing 300,000 animals at Baylor.