The potential market for Windows is the largest of any platform, he says.
I'd bet Android is catching up, though.
Sinofsky saying that the Windows Store, its app marketplace, has "the most favorable terms"
Developers everywhere are adding hundreds of apps every day, and that rate of addition is growing, he says.
The Windows Store is a fascinating bet for Microsoft. Apple has its Apple Store (as opposed to the iTunes Store).
The store also works with 109 languages.
At launch, Windows Store kicks off with more apps than any app store launch in history, he says.
Sinofsky now on to Windows RT.
Windows RT won't run most legacy Windows apps. Microsoft has a challenge explaining that difference to consumers.
It's a variant of Windows 8 that is compatible with devices using an ARM processor, the chips used in phones and tablets. Windows RT is like Windows 8 and can't run legacy Windows programs.
Windows RT has a touch-optimized Internet Explorer 10.
Lots of hyphens on the screen. "all-day" "high-quality" "out-of-the-box" Not great for messaging.
Windows RT doesn't run programs that run on Windows 7. It runs apps built specifically for its platform.
Windows RT can only run apps bought from Windows Store.
What we're not hearing is WHY anybody would want a Windows 8 without legacy programs
The apps are designed to respect privacy and are easy to download or delete. It ensures Windows RT device can remain stable and reliable, he says.
Because of shared heritage with Windows 8, Windows RT can use the same peripherals, he says.
Windows RT supports over 420 million existing hardware devices, he says.
Many of these products connect to Windows RT out of the box.
Sinofsky gives a shout out to ARM makers like Qualcomm and Nvidia, as well as old school x86 chip makers Intel and AMD.
Businesses, which are huge customers of Microsoft technology, aren't going to jump on Windows RT because of the inability to use legacy apps. Windows RT is really Microsoft's bid to win over consumers rather than enterprises.
Cue another video and we're on to demos.
Small print in the Windows 8
commercial just shown: "Features may vary from device to device."
Sinofsky used to run Microsoft's Office group. He brought many of his executives with him to Windows. Up next Julie Larson-Green and Mike Angiulo who were with him there.
Odd...one of the hanging spotlights is shaking above the audience. Perhaps some folks should move.
Julie now demoing a tablet using Windows 8.
She says Windows 8 is fun. I guess she has to say that.
The Samsung Windows 7 tablet that they've been running Windows 8 on over the past year, handing it out to developers and testers, has a fan that's large enough to be called "hovercraftian."
[Now we know Julie's password]
Julie running through the different navigation scheme with touch.
Mike is now re-arranging Julie's tile set up and changing the lock screen, which he says "changes the personality of the lock screen."
Some of this looks familiar...I remember some of this being shown off during Mobile World Congress.
Talking IE10's touch APIs
Julie now talking up the speed and improved experience of the browser.
Newly launched Xbox music service gets a reference.
After spending a lot of time with IE10, I can say that it's impressive. It's also amazing that it's coming from MS, definitely a break from past form.
Now Mike showing Windows 8 on an upgraded Ultrabook.