Well...
At first I like this post.

Considering all these sorrowful assumptions that Q5 will never come out since QL will never justify id's hopes regarding community being million strong, what's your opinion - is it possible to create a financially successful AAA-title for PC (with at least one-two million copies sold worldwide) presented as OFPS with relatively fast gameplay and pretty tough learning curve if everything outside core gameplay is designed with casual gamer in mind? I mean is it possible in any near future?

Think like it should have high-end scalable graphics, thrilling cinematic effects, fantasy / darkwave / post-apocalypse / black art / etc art setting, simplified movement (but still entertaining with lots of features), amazing challenging weapons, matchmaking system, lots of fun gametypes along with traditional ones, community-oriented features and may be even single player campaign... Is it possible to revive OFPS as an independent mature genre? :)