I use to work with the unity remote being a good deal when you need to emulate touch and sweep on screen.
But does the Unity Remote feature will be a real device emulation in Unity 4?
For now it just shows what you already draw on your mac a screen.
But if you mac screen isn’t enough big to show the entire 1024x768 ipad screen size, it also doesn’t show it at right resolution if you use an ipad as remote.
Just tested the remote that is available in the App Store. It’s the same old, you get compressed video feed to device screen and touches are sent to editor. The screen size problem difficult to cope with, but allowing unity editor to switch ‘full screen’ helps some times. But even with previous model mac book pro 15" with ‘hires’ screen, it’s real pain sometimes, even with 1024x768. Bigger external screen is almost must for serious unity stuff.
yeah nothing new… 
yes exactly…
Then nothing new on Unity4?
Did someone had the chance to try the Unity 4 + remote?
I did the test with Unity 4, yes. Nothing new there. I think that would have made to the release notes if there was something radically new with it.