Just because mobile gaming makes more money doesn't mean that traditional gaming is dead. They don't have the same audience. As long as traditional gaming is profitable it will continue to exist.
While you're certainly right on the money that traditional gaming is far from dead, some data exists to suggest that traditional gaming and mobile gaming to some extend competes for the same audience, and more importantly for the same paying audience.
For reference EEDAR defines "heavy payers" as an individual spending more than $10 a month on mobile games