If you just want FoV it is never coming out in a box. If you have Ego Draconis and just want FoV then Gamersgate is your best choice in the US. It installs and works just fine with the US boxed retail copy of Ego Draconis... consider it a large DLC.
As for the patch they are talking pretty confident about it but no, there is no 100% guarantee or anything. The visual changes and other stuff are all applied through FoV though, all you are really missing out in for PC is the rebalanced enemies and items, which make the game much easier.
