(Simplistically) Business people think about money, gamers and ground level game developers think about games. The "mobile revolution" as told by C-level executives was about the former, and it's been a screaming success.

Mobile games were never going to replace more traditional games because it's a totally different market, but companies don't really care about that anyway - they might not have /understood/ that mobile games were never going to supplant traditional console and PC gaming, but they didn't need to because they made fistfuls of cash anyway.