What is the application(s)? LCD and DLP both have potential pros and cons, many of which may be of little or no significance except under certain conditions or in specific applications.
For example, while LCD has definitely closed the gap significantly, DLP still generally offers better contrast. However, in a typical classroom, conference room, worship center or other similar application the ambient lighting is likely going to so dominate the actual image contrast that the potential differences in the projector contrast ratio may be of no relevance. How much difference does a 5,000:1 versus 1,000:1 contrast ratio for the projector make if the image contrast ratio due to the light levels in the room is 10:1 or lower? In comparison, in a cinema or home theater application with very low ambient light levels on the screen the projector contrast ratio may be more relevant.
Another example is that LCD still has issues with the 'screen door' effect where you can see individual pixels more easily, however that is much more an issue where the image is large compared to the viewing distance and not usually as much of a concern is larger scale applications. On the other hand, DLP projectors have a sealed light engine and can be compact and light, a potential factor in some applications where the physical size, weight and/or environment conditions may be a concern but not necessarily a factor in other applications.
Some DLP supporters make a big deal of the potential color degradation of LCD projectors and LCD projectors can indeed develop a yellow or green tint over time. However, how much time and under what conditions is open to debate and this would likely be much more relevant to projectors used in 24/7 applications than to those used a couple of hours a day.
I could go on about differences such as rainbow effect, color saturation and so on but the point is simply that the impact of the related pros and cons depends on the application and that for many 'commercial' applications many of the differences may not even be worth worrying about.