It's pretty interesting watching MS implode in slow motion. They dominated desktop computing(the only area of computing they lead in), and all they had to do was make minor improvements, and apply a little polish. Everyone would've been happy, and nobody but geeks would be thinking of linux. MS has been a better evangelist for gnu/linux than RMS or Linus ever were :^D
There was a point somewhere around 2010 where I was all in with MS. We ran Windows 7 on the desktop. Had an HTPC in the living room running WMC. Had it in a slick looking case, only used a remote control, plenty of plug-ins to make it seamless. Had clear-QAM HD cable with the HDHomerun, had ad-removal, an on-screen guide, integrated server-side DVD playback, photo albums through Skydrive/Onedrive, media center extenders...the WAF was high.
Had a WHS v1 pushing 20TB, which backed up the machines nightly, the drive pool concept was great and worked great, allowed bare metal restores, and had all of our DVDs ripped to it. If the system failed, the drives were still just NTFS.
Skydrive at the time allowed LAN syncing but it was kneecapped in short order.
Had a WP7 followed by a series of WP8 devices.
Of course, MS followed up by: killing WMC; removing the good bits from WHS v2 before killing it; taking the slick performance of WP7/8 and turning it into a stuttery mess with 8.1 and then eventually killing it as well. And Windows has been declining ever since as well.
edit: and like most people, I'm somewhat lazy. If they had just kept barely iterating but keeping things updated, I would likely still be there.