On the Arturia website, where it talks about Laboratory, it shows this:
"Limited time upgrades starting at EUR 49!
If you are a registered user, log into your Arturia account to discover exceptional upgrade and crossgrade offers until December 31, 2010."
I live in the USA. I clicked on the blue text "log into your Arturia account", and it says nothing about being able to upgrade from Analog Factory (which I currently own) to Laboratory. Maybe this is only currently in Europe? My Prophet V registration shows up there, but it doesn't show my Analog Factory/Experience registered there. Maybe this is why it says nothing of Laboratory.
Edit: OK, I just did the internet registration of my Analog Factory, now I can see I can upgrade to Laboratory for $69 until December 31st. I am somewhat intrigued by Laboratory, but if I am working on a song in Cubase, I can just open another session/track of Analog Factory and layer sounds if I wish. I also own Prophet V, but not convinced Laboratory is worth purchasing, but maybe I'm not understanding all of its features.