I have a Wifi Paperwhite and a 3G Paperwhite and I've wished they were both 3G.  I bought the Wifi one when they first came out and it was all I could afford at the time.  I was very eager to get the light.
I've been thinking of getting another 3G Paperwhite for a long time but that doesn't have a really high priority for me, but with the new one coming out and my curiosity about it added into the mix, I'll probably get one.  I want to read a few user reviews and wait at least a couple of weeks to see if there are any problems but then I'll probably get one.
The main worry I have about this is that it'll be so very much better that I'll want a second new one instead of my old one. 
Why can't life be easier. 
Barry