If your presentation audience is noticing pixels, then projector resolution may be the least of your problems. Nevertheless, Sony's just introduced a new pico module that'll allow manufacturers to build pocket-sized projectors with high-def, 16:9 images using laser beam scanning (1,920 x 720 with rectangular pixels).
What is #MobMin?
The Twitter hashtag #MobMin is a collection of resources to help you learn more about integrating mobile technology in your ministry.