For what I am thinking yes. Normally we wouldn't need a picture any bigger than 35" I would say.
I work for a research institute that specialises in various crops. As such we are frequently found in fields at exhibitions and such. Power can therefore be in high demand. We currently have some small portable projectors that they use to aid small displays. But they take an age to cool down before they can be moved, are very noisy and of course have no speakers.
Also, around the institute on a day to day occurrence there are small groups of people (3-8) who get together to look at things and discus them. Normally they will just huddle around a laptop screen if we have no spare portable projectors left to have a loan of.