According to this Beefjack interview, Ghost Recon Future Soldier on the PC is to be an enhanced version, and not a straight port.

Creative director Jean-Marc Geoffroy and development director Adrian Lacey  are quoted as saying,

… it isn’t a straight port, on PC you need to step up your game …Ghost Recon was founded on PC, so it’s something we’re very cautious and aware of doing right, otherwise [fans are] not happy.”

Have your say in our GRFS PC forums.