The resolution is definitely an improvement over DK1, however in my opinion it's still not high enough. It certainly makes games more playable now, but I still notice the screen-door effect personally.
This makes for an interesting problem, because in order to eliminate that effect you'd probably need a 4K screen... but hardware isn't really powerful enough to render a game at that resolution at the required framerate for VR yet.
One thing that definitely improves immersion is using a DK1 on the back of your head.
Now in games you get that feeling, similar to real life, when someone sneaks up behind that you can feel there eyes looking at you.
No more lame knife deaths!
Just got my shipping notification, nothing on the UPS website yet though! im guessing tomorrow...