Like all PC games coming out recently, i highly doubt those are the "actual" minimum specs. My rig is not as powerful as even the above specs, and I've been playing games like Metro 2033, Arkham Origins & a few other "powerhouse" titles on PC at equivalent/better performance than their 360/ps3 versions.
Now the REAL question I have, is whether or not the game will support DX9 out of the box. That is an excellent indicator one whether or not older PC hardware can run it (because keep in mind, the Xbox 360 only supports up to DX9).