Neowin found a video demonstration of Slate device from HP with Microsoft's Windows 7 operating system. The site says the video shows why Windows 7 isn't ready for tablets yet, as it doesn't appear to be very user friendly:
The video, spotted by Engadget, shows a good overview of the hardware and buttons but also shows the device booting into a fully usable copy of Windows 7. Although the device boots in 30 seconds, compared to the iPad's 15 second boot time, it's clear from the start that Windows 7 isn't suitable for a slate style device. Windows 7 appears to be difficult to navigate using just your finger. The onscreen keyboard also takes approximately 60% of the screen space and does not push any content above it to make it user friendly.