In my research I looked at 1080p systems from Sharp (LCD Flat panel), Sony SXRD (non-DLP rear projection) and DLP sets from Mitsubishi, Toshiba and Samsung.
The three D-ILA devices in each HDTV are combined with a new mirror and lens that has allowed JVC to reduce the projection distance needed and slim down the sets considerably.
But none is like the three seminal jumps in the modern era of TV, which should be remembered as: the birth of big screen projectionsets, the development of DVD, and the dawn of the HDTV era.