Actually this article is wrong.. Flash has had VIDEO hardware acceleration for flash on Windows for about 2 years now. The 10.1 hardware acceleration that they are talking about is for VECTOR.. not VIDEO.
Just wanted to clear that up for the people thinking Windows JUST got hardware acceleration with 10.1.
Wrong again. You can check the adobe's flash 10.1 technology page and among the new features of flash 10.1 you have
H.264 video hardware decoding
Flash Player 10.1 introduces hardware-based H.264 video decoding to deliver smooth, high quality video with minimal overhead across mobile devices and PCs. Using available hardware to decode video offloads tasks from the CPU, improving video playback performance, reducing system resource utilization, and preserving battery life.
So H.264 decoding has never been a part of flash before.
Also the vector acceleration is ONLY for mobile phones. Every OS, including OS X, has 2D acceleration which also applies to flash content to some degree. Although Windows might be better on this one.
Graphics hardware acceleration
(Mobile only)
A GPU-based vector renderer replaces the software renderer on smartphones and other mobile devices, resulting in faster rendering performance for more expressive user experiences while consuming less power. Supports hardware acceleration of all rendering, including vector graphics, bitmaps, 3D effects, filters, color transforms, alpha, device and embedded text, Saffron type, and cacheAsBitmap.