Personally, I'm getting the retina because it gives me the 15" screen which I've previously shied away from in the smallest form factor. The actual retina aspect of the display isn't what made me purchase it. I would have rather had a 15"Air in the tapering form factor of the 11 and 13 Airs even if the specs would have been less than what is in the pro. However, I decided to use the RetinaMBP as my main desktop computer hooked up to my 27" iMac as a display as this new Pro is more powerful than my late 2009 iMac.
If it is only the display that is going to make you purchase the retina then I would think hard about it as right now the internet and apps aren't ready for this display. This may change very quickly or it may take a lot of time. I think I'd be happy with the current hi-res option on the 15"Pro if I could have that screen on a 15"Air.
The retina display will improve 100% viewing of photos (which is my main use for my home computer), so I am happy about that. Also video editing seems improved as you can have a native 1080P preview window and still tonnes of other real-estate on the screen.