Read it well, desktop, and not notebook. But yeah that something very interesting is happing you've been able to witness for the past three years now. 

AMD surpassed Intel in terms of market share desktop processors, the data however is limited and based on published results from PassMark. PassMark Software's benchmarking results for the first quarter of 2021 show that AMD took a 50.8% share of the global desktop CPU market, leaving Intel at 49.2%.

The last time the AMD had taken the lead was in the first quarter of 2006, although that only lasted a quarter.

When you combine all results on all segments, Intel has a clear lead, but certainly, the trend has shifted. 62% for Intel, and 38% for AMD.

 Things are different in the notebook segment, Intel here still leads with a huge 84% share, AMD thus at 16%. The difference is even more pronounced in the server segment, where Intel has 98.6%, while AMD takes the remaining 1.4%. However, with EPYC, that number might change fast as well. 

Of course, the numbers are limited by demographic, as they are solely based on PassMark entries. Would you look at the gamer side of things and compare with Steam results, for example, the difference would be just that, very different.

AMD surpassed Intels market share in desktop processors