If I do get a PS4 I probably will do but only to talk to friends, I will not bother otherwise. I tend to only do this on the Xbox as well only use it when I talk to friends in a party or in the lobby of a game.
I also don't see much of a reason for supplying headphones since many people with cell phones have those hands-free bluetooth wireless headphones and mic for Cellphones, and cheaper wired headphone and mic for headphones which both can be bought for $5-20 or more. I think both the wired and wireless bluetooth headphones should work for the PS4 if they had the right connectors for them on the PS4.
I rather use wireless headphone and mic since the wires might get in the way of gaming.