There are plenty of inflatable domes, that could act as a Home Imax style set-up. These are used for travelling planetaria visiting schools, amongst other applications.
Some of the high-end people here have in previous threads noted the limits to the accuracy of and imperfections in the domesurface. This may be addressed by building a fiberglass enforced dome instead.
Current warping software includes multi-projector warping and blending on dome surfaces, this has been demonstrated on multiple occassions at the Integrated Systems Europe show for a number of years now (for instance Canon had a dome to cover its booth last year, using the AVStumpfl Wings Platinum software to adapt the projection image to fit the domeshape surface).
Edited by donaldk - 5/30/13 at 4:10pm