I feel like no one read the entire article, and it's partially the fault of traditional newspaper writing style for sticking the juiciest stuff up from, but the article concludes there's no consensus on what chronic sleep deprivation does to humans.

> Nevertheless, many scientists said that the new research should not be cause for panic. “It is possible that sleep deprivation damages rat and mouse brains, but that doesn’t mean that you should get stressed about not getting enough sleep,” said Jerome Siegel, a sleep scientist at the University of California, Los Angeles, who did not contribute to the review.

> Dr. Siegel noted that neural injury comes in degrees, and that the extent of sleep deprivation’s effect on the human brain is still largely unknown. He also expressed concern that undue worry about the long-term effects of sleep deprivation could lead people to try to sleep more, unnecessarily and with medication.

The opinion of a single review paper on effects in mice is not conclusive science. So, in other words, there's no news here.