There's nothing specific on the horizon, but the way things are going, what with all the domes and mirrored domes and Buckminster Fuller and movies and all around here...
I mean, you never really know--and by you, I obviously mean me--so I thought I'd just go ahead and put this link to Paul Bourke's patented system for projecting onto a dome using a spherical mirror, which he developed in 2003.
Actually, it seems to use a hemispherical mirror, and there are apparently inflatable domes for all your portable indoor planetarium needs--according to the FAQ, a 3m inflatable dome is ideal for half a dozen adults or a dozen children--and seamless works better than paneled.
Another note to self: I don't care what they call them in Wollongong, but I will not be calling them Sphemirs. And probably not Mirrordomes, though that is much better.