OK, if the projector is using shutter glasses any screen will work, a high gain screen might help offset some of the light loss that 3d causes, so that's something to keep in mind.
If it uses polarizers, then you would need a silver screen, but i doubt this will be a popular choice for manufacturers, but you never know.
After all, a lot of people use projectors to for big audiences, and polarized glasses are as cheap as it gets. (about a dollar a pair for polarized, vs $50+ for shutter glasses)
It's too early to tell, but i wouldn't be too surprised if most manufacturers use shutter glasses and maybe sell polarized filters that you can use as an add on if you want to use a silver screen for polarized.
Basically, any shutter glasses projector could easily have an add on switching filter like this one:http://www.reald.com/Content/RealD-LP.aspx
That way they could support shutter glasses for people that have either a white screen and / or small audiences. And people that are willing to go the silver screen route for big audiences and cheap glasses.
Anyway, if 3d is something you plan on doing, just keep in mind that whatever technology you pick, you will end up with a lot less light output than 2d, so if anything plan ahead for brightness.