The only question in the OP and the title is ” ipads-why are they taking over the world?”
which I read as why are they so popular over other similar devices?
Now all the products mentioned are pretty much the same thing really.
The iPad does nothing any of the specd devices from Google/Asus etc can’t .
The Android platform does undoubtedly give you a lot more freedom. Although I accept the majority of pad users do little more than surf the net, view pictures etc basic stuff and need it to do little more and be happy why wouldn’t they.
some others may wish to do a little more nothing complicated maybe use of a DLNA controller for streaming through their own choice of media players and libraries or transferring files of any type how they want.
This is where Apple let themselves down and seem to find the need to purposely limit how the device can be used.
They even now added an authentication chip to the charger cable of all things! So they can sell to their loyal customers at 10x the price of a USB mini it’s a bit of a low blow , no?
Everyone else is working towards standards where Apple are doing the opposite.
This is why I am genuinely puzzled as to why people are still putting up with this shit.
I seriously think the Answer to the question is simply fashion .
A lot of people are catching on though and pretty soon their bubble will burst IMO