Not sure if it's actually an acquisition based on that wording, as it could easily just be a continued partnership. But if so I think it's an acquisition that would massively help Housemarque, and thus make their games better. Just like Insomniac and all the Xbox acquisitions of the past 3 years, this is the type of acquisition that would improve the industry, even if sadly it guarantees that Xbox only users can never play their games, it helps a studio with more time and resources and marketing, which improves their games . I think this is the way better route forward than moneyhatting 3rd party games that doesn't improve the games at all.
And for those of you saying "so what they were already making Playstion exclusives". Two things, 1. This will make the games bigger and/or better, and 2. Remedy and Bioware used to make Xbox exclusives, sometimes things change, and getting them locked down guarantees that never happens