Your headline is misleading. The initial Internet activation required during the installation of Bioshock is still present and required despite this change. So, Internet activation is still an “installation restriction” that is present in the game. What has actually been disabled (but not removed per se since the game has not been patched with this change in the DRM’s enforcemcent) are the limits on the number of installations of the game per PC (actually per PC hardware fingerprint which may constitute a different PC or the same one with changed or upgraded hardware).

So, the bottom line is this change in the game’s DRM/copy-protection is mostly P.R. bullshit and far less than the removal of the Internet activation requirement that was originally promised by 2K after the game’s release.