The touch interface is evolving, allowing users to draw directly on touch-sensitive screens. ViewSonic unveiled a monster 32-inch drawable display, a size that dwarfs the mid 20-inch range of products from market leader Wacom, although the latter has better pen and markup sensitivity. The ViewSonic display on the Computex show floor responded well to drawing motions and different degrees of pressure, but sometimes missed clicks and swipes. Specs are still being finalized but it will go on sale in the U.S. in late August, for $3,000. The device uses a digital pen, rechargeable via a USB cradle; the pen runs 80 hours per charge. ViewSonic is going beyond the traditional graphics market, marketing to telecommunications, hotels and education.