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Tablets are the perfect form for supporting handwritten input, and Windows 8 is easily the best platform for such support. Pen input has been available in Windows for over a decade, and Windows 8 leverages it fully.
Certain apps like OneNote and Windows Journal work particularly well with the pen but it's not limited to those. The onscreen keyboard used in Windows 8 for touch entry can be switched to handwritten entry on tablets with a pen. The automatic text recognition can understand even poor handwriting for entry as text.
Bing news app
There are lots of news reader apps on all the mobile platforms but the Bing News app in Windows 8 is superb. It is particularly suited for touch operation on tablets and is a joy to use. It's exclusive to Windows 8 so the competiton is out of luck.
Run any browser
Every browser out there will run on Windows so tablet users aren't restricted to one or two as on other platforms. All of the popular browsers (e.g. Firefox, Chrome) can be used on a Windows tablet so everyone's preference will work. Internet Explorer is pretty good in Windows 8 but it's nice to have options.