Square Enix has launched anfor Final Fantasy 7 on PC, which confirms that the game will be released "soon".
Final Fantasy 7 will be improved for PC to run on modern hardware and will launch with 36 achievements. You'll also be able to share your profile online.
For the moment it seems the game will only be available to download from the Square Enix store, although a Steam version could still happen.
Here's the minimum system requirements:
* Microsoft Windows XP/Vista/7 (32/64-bit) * 2GHz Processor or faster * 1GB RAM * DirectX 9-compatible graphic card
* 2GHz Processor or faster
* 1GB RAM
* DirectX 9-compatible graphic card