And windows phone.
They've achieved a higher percentage of smartphone marketshare in just a couple years than apple ever achieved in the desktop market over 30 years.
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Comparing mobile phone space with desktop space is IMHO an unhelpful red herring.
MS has single digit share of an incredibly important, strategic market (mobile phones) in terms of where the future is going. That's fine if you're an almost-failed Apple, pulling itself up out of the gutter of near ruin. If you are the dominant player of the past 2.5 decades it's a total disaster for long term shareholder value.
There are more computers running windows today than every apple device ever made. Microsoft isn't going anywhere soon.
Yes there are - and these all represent PAST expenditure, and only suggest SOME potential future revenue.
MS made the classic sales & marketing mistake with Windows 8 - they didn't give enough people enough reason to buy, and to buy from them. It doesn't matter what technical benefits Windows 8 has over Android, OS, iOS or Linux if the consumer/end user cannot differentiate Windows 8 over the others in those areas that matter to them, or if they see no reason to move away from what they currently have.
Lumping mobile devices and desktops together makes sense from an analysis point of view when you look to move more people from desktops to mobile devices, and/or provide a more seamless & integrated experience for users what wish to operate without issue in a combined desktop/mobile device manner.
Since late 2006 I've moved, like many millions, from PC to MacBook, followed by a second one, then to iPad, then the addition of a Mac Mini, and my next phone will be an iPhone, even though I love my Galaxy S3. Not because of better technology, but because of a better overall user experience.