Quote Originally Posted by Delmontyb View Post
This I don't know, because I heard the same thing and seeing on IGN they did it with the Wii U and Super Mario 3D World. Where they showed off the game on the TV and on the Gamepad. I think that there might be some lag, and I haven't tried it for anything but FFXIV, but I think there might be some trouble with a fighting game for example. If I end up getting another game for the PS4 I'll give that a shot as well.

When I press a button it feels instant on the TV for me with XIV, so it's possible that Microsoft did fix the lag in TV, that or the lag was a bug do to it being a new system, and their other updates have only improved the system performance.

I really wish I would have tested this with my Wii U while I still had it, but I traded that in for the PS4. :S
I'm sure there is a slight delay, but a lot of it has to do with your television as well. Most of the game sites out there use pretty low end TV's/Monitors with terrible refresh rates.