Usually when you think of something being anti-competitive, it’s because it’s bad for consumers. But you can also be anti-competitive by doing things that are appealing to consumers in the short term (like selling a product at a loss) but help ensure market domination for the longer term.

Valve’s position here is tricky, the steam machine would have a small marketshare compared to consoles, but as a PC it could be considered furthering Valve’s PC game “monopoly”.