"what was epics most profitable game ever?? gears of war... nope it was infinity blade.."
Nope. Try again.
You just made the same mistake that every retarded gaemz jernalist made when that news hit. Gears makes more money than Infinity Blade, hands down, by miles. Infinity Blade had a larger return percentage on it's initial much-smaller cost.
Let's make some numbers! Gears cost $1000 to make. It brought in $10,000 in cash money. Infinity Blade cost $100 to make. It brought in $2,000 in cash money. Your statement very clearly says that $1900 is more than $9000, which is obviously wrong to even the most casual of observers.
Epic is an enormous studio. They can not support their enormous size on iOS titles alone. As such, they are currently making a PC exclusive title, another Gears title, another Infinity Blade, and another engine. In other words, nothing has changed from their last decade of operation.
ADDITIONAL: Oh, and this "most devs are working on..." that everyone is throwing around? No. Stop it. A bunch of different devs are working on a bunch of different things. There is no "most are doing X".