I have no doubt it won't it's just a shame sales were so low on it's release.
It was the same with the first two Witcher games, but thanks to sales they both sold a combined eight million copies years later. It's the same for other RPG games also.
Perhaps you have lost touch with how the majority of gamers behave by being so entrenched in a specific hobby-site?
The Witcher games are primarily two-fold enterprises:
1. Action RPGs on a PC
2. High performance requirements games
As regards point 1, back in 2007 action RPGs weren't what was hot. Half the market was still yearning for D&D-like material and the other (bigger, more casual orientated) half had migrated to MMOs. It's only since people started getting bored of MMOs, stopped bothering to expect new D&Ds and since Oblivian/Sykrim started to dominate the mainsteam (because nature abhors a vacuum) that the Witcher's category of RPG has come to the fore. Similar to how Dark Souls snuck into the same gap.
I've tried all three, Withcer, Elder Scrolls, Dark Souls, and that kind of RPG just doesn't appeal to me. I last about 30 mins to 1 hour every time. I don't begrudge the success, but I feel really quite offended when someone suggests it's 'sad' when they struggle to sell - sad for who? Not for me, mate. Aside from dedicated fans on extremely specialist sites, there will be many who have a similar history to me who might only now being trying really hard to 'get into' this stuff for the sole reason that it's now 'sad' not to (though I, personally, don't care about being 'sad' and continuing as normal).
On point 2, and this is probably the more salient point, when PC games get first released they all (those with a decent budget) invariably require you to own the most up-to-date PC system possible in order to get the maximum enjoyment out of the game. Unless you are in the position of both having gaming as your primary hobby
and you have cash to burn on said hobby, then most gamers will live in a world of sporadic catch-up, where they will have a year or two of buying the latest games then three or four years of gradual backlog which they catch-up on when they get their next system.
And this is why PC games always have more staggered sales rates over time than console games which are more like movie releases, designed to satiate people for 1 or 2 months until the next blockbuster comes out. Consoles don't have 6 monthly increments in improved hardware like PC does, it's a completely different mind-set.
