Really, I can see some bad assessments in it. #3 and #4 are easily refuted via IE and Xbox. The Bing example in #1 is pretty bad as without Bing they wouldn't have had a partner like Facebook and they would have struggled to find services for Windows phone and tablets.

Also for a article picking on statements from others, statements like "Surface is an attempt to pretend Apple didn’t solve the tablet problem when they introduced the iPad. " seems plain stupid since Android has taken the lead from Apple and I don't think anybody believes the tablet "problem" is solved yet