Not to sound like a dull old person, but it seems that the youngsters today are living their lives like computer games rather than living the life and gaming separately. In that vein, Angry Birds are par for the course for majority of users, while WoW etc. are there for the hardcore dorky part of the population.
With regards to the platform - less and less and less people are willing to splash out on huge, cumbersome, complicated and unreliable gaming PCs, more and more are satisfied with the console for gaming+tablet or netbook for internet browsing.
So let's face it - we'll have a world where nobody is playing flight sims, except for those playing real-life flight sims (like everyone flying Airbuses, modern military planes or UAVs
)... I'd say in 20 years or so.