If you are trying to compare it to the year of Linux, it would be wise to look at how the market changed in general rather than how the market changed for Microsoft. Linux did not decimate Windows, but it has certainly hurt other platforms and it has likely hurt Microsoft's reach.

Likewise, I doubt that GPGPU applications will decimate Intel. It will likely hurt Intel's reach. This is particularly true if AMD, ARM, and IBM are facilitating the use of to GPU as a high performance coprocessor.