Lenovo won't be sticking to just a single OS on their new line of tablets. The IdeaPad P1, which looks a lot like the K1, was also introduced this evening, but unlike that one, this slate uses Windows 7 instead of Android 3.1.
Windows 7 hasn't had the easiest go on the tablet market -- it was never really engineered to work well with stylus/finger input, and with Windows 8 en route, there are doubts about what kind of traction a piece like this will get.
The tablet may be more suited to business pros who just need a full-on copy of Win7 by their side. Thankfully, the device packs plenty of power underneath to take advantage of it. The IdeaPad comes with a 1.5GHz Intel processor, a 10.1" (1280x800) display, up to 2GB of DDR2 memory, integrated Bluetooth, built-in 3G and Wi-Fi. Lenovo also includes a front-mounted 2MP webcam, a USB 2.0 connector and a microSD card reader (with docking port on the side).
The tablet will ship in silver or orange, and a matching carry-case will be thrown in as well. This one works well with finger and stylus input, perhaps with the expectation that Win7 users will be doodling and taking a few notes. Lenovo's not shipping this one until closer to the year's end, and pricing won't be nailed down until closer to that point as well.