The High-End, Specialty Projectors category includes extremely bright projectors suitable for larger auditoriums largest lecture halls, museums. Also, large and largest houses of worship (i.e. mega-churches). Since most churches, temples, mosques, etc., do have religious schools, most qualify as being part of the education market, as far as most manufacturers are concerned.
Also in this group are specialty signage and related application projectors such as Epson's Lightscene (reviewed last year - award winner), which is geared for museums and more (retail), with capabilities such as edge blending and projection mapping.