Compared to their dumber e-ink cousins, tablets with LCD screens suffer at least two notable disadvantages: their batteries last hours or days, rather than weeks (or months)
, and they're notoriously hard to read in the sunshine. Neither of these problems are likely to be licked soon, but the gap may be shrinking: Mary Lou Jepsen's OLPC spinoff Pixel Qi has now shown off a 10", 1280x800 panel
. Pixel Qi's screens are well-known, though not currently widely adopted, for their ability to run in a high-contrast, low-power greyscale mode as well as a still-frugal color mode. Though the company is currently showing prototypes rather than a shipping version of the new high-resolution screens, it's reason to renew hope for a long-lived color-screen tablet that's comfortable in the sunlight.