The HP slates got an SD card reader, a USB port, HDMI-out, a VGA webcam, a 3-megapixel camera and a “conventional” SIM-card tray. Its got more RAM, a widescreen 1024 x 600 display (that supports 1080 HD FTW ... cant believe apple is releasing a device for consuming media and they dont even let u watch movies in high def?)
its got its faults - low battery life being for me the biggest deal but w/e when even McDonalds has wifi and plugs now im not that worried. it also doesn't support wireless N, but seriously I havent noticed much of a difference since installing a wireless N router on my own home network so w/e.
The greatest thing about the Slate vs the iPad though, IMO is the fact that it will definitely be more of a social device. With more ways to interact via skyping face to face, as well as easy interaction with the social networks that everyone is already familiar with, it just seems like a bit better choice considering the popularity of Facebook in peoples lives... and wait - one last thing, the iPad doesn't support makemoniesonline.com and that seems like the ultimate dealbreaker for me.
also check this out:
[ame=http://www.youtube.com/watch?v=WBtEhQqS1dw]YouTube - Misconceptions of the Windows 7 Touch UI[/ame]