Comment by fuzzfactor

In some situations, each viewer having their own personal display screen would be the ultimate, but the projector is the most suitable workaround.

Other times the center of attention is intended to be drawn to the presenter, so the projector is much more suitable than individual screens would be.

There is a difference between business projectors and entertainment models. Either way to get the most out of it I would say you definitely need a high-performance dedicated projector screen, maybe check with the pros who rent the AV gear to conferences and get their advice on the ones they think work best. Without them actually trying to sell you products it should be possible to get some honest evaluation under non-ideal conditions.