Acrobat and Silverlight seem too popular. There's Flash so you don't need Silverlight, and there are tons of better alternatives for Acrobat.
I suppose Silverlight's so popular because anywhere it's used, there's a huge ad tellling you to download it. I guess most don't understand what it is, and many of those who do, simply don't care. I still don't have Silverlight and never will. I don't like Flash either but it's used so widely it would be hard without it. I'm still waiting for HTML5, though, and hoping it will replace Flash. But I suppose it's not going to happen.
DX10-enabled OS seems to be popular today. Maybe Valve is waiting for DX9 to die before releasing Episode 3. /joke
Also, why is IE at just 19.82%? It comes with every edition of Windows and still is the most popular browser.
