Portaprojectors have gotten a high profile writeup in David Pogue’s latest column in the New York times. He highlights the technology as it begins to come of age, and features two devices, the Aaxa L1 (which he likes), and the LG Expo (which he doesn’t).

New technology follows a certain cycle. When a new category bursts out — the VCR, the MP3 player, the netbook — the first models are crude, expensive and underpowered. Several months later, me-too companies rush in, bringing the prices down and the refinement up. A few years later, the VCR, MP3 player or netbook reaches its final form, with only minor refinements in the years to come.
Last year, the world raised its collective eyebrows while witnessing the debut of the pico projector: a tiny, cellphone-size device that can project your photos, videos or PowerPoint deck on a screen or a wall. A small wall, to be sure — the biggest image is four or five feet diagonal, and only in a dark room.
Even so, the possibilities are tantalizing. On a plane flight, you’re not doomed to watch your movie on some three-inch iPod screen; you can use the seat back or even the ceiling as your screen. On a campout, you can review the day’s photos on your tent wall. In the elevator, you can do an impromptu PowerPoint pitch for the big financier. At home in bed, you can turn off the lights, point the thing straight up and enjoy a huge, bright image on the ceiling.
Both of these new pico products — the LG Expo and the Aaxa — are right on schedule. They’re advances in a device evolution that’s just getting under way. But one thing’s for sure: pico projectors have a very bright, high-resolution future.