I have a Samsung Galaxy Tab 10.1 for work. It runs on Android. For business use it is great for most needs. For those who like typing you can dock it into a keyboard (bought seperately) rather than poke the screen. And you do not have to tie yourself to Apple's proprietary hell although you do find yourself sucked into the vortex which is the Google empire.

Also, as distinct from my laptop, the Galaxy has currently been up for 13 hours without needing recharged (the battery currently shows 38% charge left).