Competition among tablets is fiercer than ever. The HP TouchPad is out, and there are a handful of compelling Android tablets available now. Even the BlackBerry PlayBook has a lot to offer.

Meanwhile, Microsoft - who never garnered much interest for the Tablet PC platform - has announced that Windows 8 will run on computers and on a new breed of Windows 8 tablets.

Details are sketchy, however. Here are 8 must-have Windows tablet features we want to see at launch.

1. True multitasking

If Windows tablets do not provide real multi-tasking, and instead work more like a Windows Phone, the platform will start off slowly. On the PlayBook, you can run a game in the background and it will continue to run. You can even upload files to Dropbox and switch over to your e-mail and send attachments. On a Win 8 tablet, multitasking would be a major differentiator.

Multitask

MULTITASK: On the BlackBerry PlayBook, games will run in the background even if you switch to a different app. Windows 8 tablets need to follow that lead; apps should not just pause

2. Outlook Cloud

Microsoft has experimented with cloud email since the original Hotmail, yet they've kept the basic Outlook client in tact. (Exchange Online is a step in the right direction, though.) On a tablet, Outlook should become a full cloud-based client like Gmail. On your computer, a Windows Phone 7 device, or Windows tablet all email should be a click away.

3. Zune video rentals

Not all Android tablets offer a video store - the Motorola Zoom and HTC Flyer do, but not many others. Microsoft will likely port Zune software to tablets, offering video downloads as they do now on a Windows Phone. To compete with Netflix, Microsoft should also offer a monthly plan to stream at least a few major Hollywood releases and not just for-rent downloads.

4. New touch features

Windows 7 hinted at some innovative touch features - on a touchscreen laptop, you could spin a globe, rotate photos, and play a few touch-enabled games. Windows 8 needs to go beyond what Apple offers with the iPad and include quick gestures for deleting emails, photo rotation, and a new way to control games. The challenge is to make the most powerful apps, say for project management or video editing, work with gestures, zooming, and swipes.

Gestures

GESTURES: Gesture control on an Android tablet means swiping through a music library and zooming in on photos. Windows 8 tablets need to go even further and offer swipe gestures for email and other apps

5. Grouped documents

The HP TouchPad enables you to group documents together even if they are from different apps. On a Windows tablet, we want a feature for grouping documents from Excel and Word, add related emails, and even Internet Explorer pages using the tile interface. This grouping would help organize projects in the same way you'd group files on a computer. A way to then e-mail all grouped docs would be a bonus.

6. Full Office apps

The Apple iPad lets you view and edit Office documents, but not with full desktop-like applications. Windows 8 tablets provide the Office suite for editing rich documents, making pivot tables in Excel and adding charts, and making PowerPoint slide sin a way that competes with Keynote (templates, slide-sharing). And, each app needs to print over Wi-Fi.

7. Surface mode

Here's a unique feature that could set Windows tablets apart. Microsoft should take what they have learned with the Surface Table and move it to the small screen. This should include two-player chess and checkers, shared photos that multiple people can stretch and rotate, and a full-screen browser that works faster than Google Chrome on a desktop machine.

Microsoft surface

SURFACE: Microsoft Surface is a multiuser touchscreen table, but many of the concepts could be ported to Windows 8 tablets

8. Ported Xbox 360 content

We want to see a version of Halo running on Windows 8 tablets at launch, plus other Xbox 360 games like Gears of War. Too much to ask? If Microsoft really wants to dethrone Apple, it should start by making the Windows 8 tablet the go-to platform for games, include achievements and link into the console version of the game -- maybe even as an extra controller.

----------------------------------------------------------------------------------------------------

Liked this? Then check out Top laptops: the 20 best laptops in the world

Sign up for TechRadar's free Week in Tech newsletter
Get the best tech stories of the week, plus the most popular news and reviews delivered straight to your inbox. Sign up at http://www.techradar.com/register

Follow TechRadar on Twitter * Find us on Facebook