Bedwyr,
Given that the Hyperspin community has been super friendly and even provided Jason with the API to share all their artwork with Launchbox for free and the RocketLauncher team is working to create a plungin for Launchbox, again for free , I would say it would be really insulting to everyone making the cross over or even those of us working with both front ends to be told to take a hike.
Same goes for Emumovies which is essentially the same community as Hyperspin. You cant have all our art work and enjoy the fruits of our labour and then tell us to stay over there. At this point in time, there will be a lot of crossover and a lot of people going back and forth. That's life!