What you have said in about MS apps being better on iOS and Android is a bit misleading because it is a case of "living in the past."
So when did this change?
With Windows 10 comes the end of Microsoft apps being better on Android and iOS.
And how, may I ask, do you know this?
Keep living in the past, because the experience on Windows 10 mobile will far surpass that of any iPhone or Android, period.
You're speculating. We've been hearing similar statements for a long time already. Most realists are to the point of "I'll believe it when I see it." It could happen, and probably will eventually. OTOH, it may not ever be fully realized. I don't know, and neither do you.
The thing is, as much as you hate anything not Microsoft, you must realize that Apple and Google are not resting on their laurels. We're probably at least a year away (and likely more) from seeing even the beginning of the potential utopia you're talking about here.
The apps we're talking about are Microsoft's. There are others, you know. Now, we know that Microsoft's apps, Office specifically, are much more capable than Google's and Apple's productivity apps. However, for the vast majority of users, using Office is like using a sledge hammer to drive in a thumbtack. Most of the functionality is not utilized.
Sure, you can make a long bullet point list of functions that Office has that iWorks and Google Docs do not have. But how many of them are used? You know what WP fans say when they are reminded of features on iOS and Android that WP lacks, "My WP does everything I need." Same difference.
I don't want to completely discredit what you're saying. I believe that the day may come when what you're speculating here will come to fruition. But IF it does arrive, it won't be tomorrow, or probably even next year. And by that time, who knows where Apple and Google will be?
I just think it's a bit presumptuous to be stating what you'd like to see as fact. It isn't, yet. Wait and see what happens, THEN go ahead and gloat all you want!