Microsoft is doing quite well when you look at the bigger picture.
Everybody who wants to trash Windows Phone tend to focus on WP's Market Share in the US, while elsewhere in the world, their market share is much better.
Case in point is this article I just read about 2 mins ago:
IDC: Windows Phones held 9% smartphone market share in Sri Lanka in Q4 2014 - WMPoweruser
Elsewhere, areas of the EU have a healthy increase in market share.
As for the comment about Windows RT, specifically Windows' mess up in the tablet market, Microsoft is actually doing better in that department too.
IDC Tablet Forecast Predicts Windows Tablets May Become Threat To iPad : PERSONAL TECH : Tech Times
Based on the tablet market figures released by the IDC, worldwide shipments of the devices will reach up to 234.5 million in 2015 which is a modest increase of 2.1 percent compared to the previous year. IDC said that the boost in sales of the devices is the result of the arrival of Windows 10.
"The introduction of Windows 10 later this year is expected to be well received and support the Windows ecosystem, including some PC replacements," said by the IDC. "However, it will also provide a better experience with mouse and keyboard, effectively relieving some pressure to move towards touch, and supporting non-PC devices such as two-in-ones, likely without boosting total PC shipments significantly."
The IDC has also forecasted that Apple's market share will have its first taste of decline in 2015, something that will place it at its lowest level in three years. A number of speculations claim that Apple is gearing up for the release of a bigger iPad that it touts as having advanced features to rekindle sales. However, some experts seemed to disagree.
As for Windows Phones, I have no concerns about Microsoft dropping them anytime soon.
Just because Steve Ballmer messed things up by jumping too far ahead of what consumers wanted in Windows 8 and Windows Phone not quite reaching the expected heights, that doesn't mean Satya is going to do the same thing and so far, he hasn't made any major mistakes with the direction he is going.
Steve seemed to have taken a page out of Apple's book by making something and then hyping it up to being everything everybody wanted without even asking, but Windows users are not like Mac / iPhone users. They have brains. You can sell a 1" wristwatch to Mac fans at $10,000+ or sell them a tin foil thin laptop with only one port which you need to buy an $80+ adapter to do more than one thing.... And they'll bow in it's unfounded glory as something nothing else can compete with & throw their money at Apple because Apple tells them to.
Satya understands (so far it seems) that Windows users have brains and he wants to get feedback from those brains in order to make products those brains want. Because of this, Microsoft has the ability to break the Android / iPhone Dominance over time.
As far as I can see, there is only one way to go from here and that's up.