Keep an eye on their blog, eventually they'll finally release the PC engine upgrade.
http://apbreloaded.gamersfirst.com/"Engine Upgrade
Now that we’ve successfully launched a version of the new Engine on the console platforms, the majority of the general engine upgrade bugs relating to game-play and rendering are fixed. Right now a full regression is being done on the PC to confirm fixes. Platform specific optimizations are being evaluated and ported to PC - including multi-threaded rendering and GPU texture generation for customization which the PC version has never had before.
Once we are done with the first pass we expect to release a new engine version that can be tested by the community on a larger scale than we can achieve internally (especially with more versions of GFX cards and CPU varieties). With the feedback from that testing, we will fix the remaining issues and finalize the engine upgrade release. This all takes time and we appreciate the patience our community has shown while we work on the Engine Upgrade and bringing it all back to the PC." Will probably still be a 100mil shitty game.