I'm probably the only one who doesn't know but these Milkyway preferences seem to indicate a graphics display:

Period (in milliseconds) to check for scene updates 30
Change how fast the view randomly moves around 5
Make particles bigger or smaller 250
Make particles bigger or smaller when using uglier particles 40

However none of the projects I have run seem to have graphics associated with them and my BOINC graphics button for Milkyway tasks is always greyed out. Am I floating through dark matter or just missed something? Thanks

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My opinion-until we hear something official: it looks, to me, like someone is setting up preferences ahead of time, in 'anticipation' of the day when a screen saver is produced; and the listed preferences relate to the expected visuals. [Particles=Show some (solar) bodies; Coarse=A group of Particles....]