iPad as a threat to Windows

I think it could be. [Link]

Now, some of these things apply to an iPod Touch or an Android mobile device or an iPhone. But the form factor (size of the device) are key here in terms of usability.
The 3 things I mention here are so outshine the Windows PC experience that if Microsoft doesn’t get off its duff and start addressing them soon then I predict Windows will become purely a content creation device whose content is primarily consumed elsewhere.  There’s really no excuse that in 2010, Windows is in the shape its in (particularly with regard to instant on).
The iPad is only the beginning.  Once Android devices and WebOS devices show up, it could spell the beginning of the end of Windows dominance.

The instant on, the perceived speed and the app store worry me as well. The "it just works" factor also is important.

I think we may have seen the zenith of complex, windowed, multitasking software. It will never go away, as there is a need for it, but I think for consumers and general computing users, multitasking is vastly overrated.
Also, Windows has to deal with 15+ years of cruft and requirements for backward compatibility.

I bet in 5 years I will be making software for a platform like this. Maybe Windows 7 Phone will be Windows 7 Tablet?