http://www.gnu.org/philosophy/nonfree-games.htmlHowever, if you're going to use these games, you're better off using them on GNU/Linux rather than on Microsoft Windows. At least you avoid the harm to your freedom that Windows would do.
Thus, in direct practical terms, this development can do both harm and good. It might encourage GNU/Linux users to install these games, and it might encourage users of the games to replace Windows with GNU/Linux. My guess is that the direct good effect will be bigger than the direct harm.
I don't think you'll ever see him using it, or telling people to use it, but he's pretty clear that it isn't an entirely negative thing to have, and actually will do more good than bad.