The HP Slate isn't a revolutionary device nor is it an iPad killer. It is nonetheless very evolutionary.
Pros
Wonderful inking experience
Native Windows application support
Good number of connections and ports
Strong video playback capabilities
Cons
Doesn't support a lot of touch optimized software
Low battery life compared to ARM based slates
Expensive compared to consumer slates
Poor viewing angles in primary landscape mode
HP Slate 500 User Full Review
As a tablet PC user since the launch of Windows XP Tablet PC Edition in November 2002, I've longed for a lightweight, portable and thin slate device that essentially functions as a digital notepad computer, and this is what I believe HP has delivered in the 500. There's nothing new here, the Slate is just a vanilla Windows 7 Professional device with practically no 3rd party applications installed except Evernote and the camera software, but I think that's actually a good thing as it keeps the unit from being bogged down given its adequate but less-than-powerful Atom platform.
HP Slate 500 Specifications
Genuine Windows 7 Professional
Slate tablet design starting at 1.50 lb/0.68 kg
8.9-inch diagonal LED-backlit WSVGA wide-viewing angle display (1024 x 600 or 1024 x 768 for some applications)
Capacitive multi-touch screen with pen digitizer
Integrated 802.11 b/g/n wireless LAN
Bluetooth 3.0 + HS
Intel System Controller Hub (SCH) US15W chipset and Intel Atom™ processor
64 GB SSD