Hewlett-Packard Envy X2 — The consumer equivalent of the ElitePad is slightly larger, with an 11.6-inch screen, but weighs the same: 1.5 pounds. A keyboard dock with an extra battery doubles the weight and turns it into a small laptop. Launches this holiday season. HP hasn't said what it will cost.
WINDOWS RT TABLETS — Though they lack the ability to run standard Windows programs, these light tablets include a version of the Office software suite for free.
Microsoft Surface — Yes, Microsoft is diving into the hardware business, making its own tablets and competing with its customers, the computer makers. The Surface will have a screen that measures 10.6 inches diagonally, slightly larger than the iPad's. Optional covers double as thin keyboards — with no real buttons, just printed "touch zones." Available now starting at $499. Keyboard cover is $100 extra with base model, included with $699 model. A full-fledged, non-RT version will come later at a price that hasn't been disclosed.
Asus VivoTab RT — This tablet looks very much like the Asus Transformer line, which runs Google Inc.'s Android software. The 10.1-inch tablet docks into a keyboard, which also extends the battery life to about 15 hours. The tablet costs $449 and the dock $149. Available now.
Dell XPS 10 — Another 10.1-inch tablet that docks into a keyboard. Starts at $499 and goes on sale some time later this year.
REALLY ODD PRODUCTS — Windows 8 has prompted some manufacturers to think well outside the box.
Sony Tap 20 — This is an "all-in-one PC" — a desktop computer with a built-in 20-inch diagonal screen. The difference here is that the Tap 20 has a built-in battery, so it can be lugged around as an enormous tablet computer. It's four times the size of the iPad screen. Place it face up on a table and have the family gather around. It can keep track of up to 10 fingers touching the screen at once. The Tap 20 will go on sale Wednesday starting at $880.
Asus Taichi — This laptop has 11.6-inch screens on both sides of the lid. When open, one screen faces the keyboard and the other faces away. That's convenient for presentations, Asus says. When closed, the outward-facing screen becomes a tablet screen. Taichi will go on sale in November starting at $1,299.