Sadly, this is reality!
It's more like the cycle of life which is from birth to death, everyday new things are innovated while the old ones are being pushed out of the market...
Even at the pace of nokia fading away they try as much as possible to create new things to keep the company alive and going!
I remember when blackberry mobile phone was created it was the talk of town, everyone desires that particular phone but where is it now?.... it's abolish..even WhatsApp is not functioning in there.... now what's popping currently is Iphone cellphone.
Like you said -- All advancement, leaves something behind. Every innovation replaces something.
Nokia phones isn't much, but the networks side of it is still going strong. It is an infrastructure business, so the enduser doesn't see it.
But, everything is continually under pressure - it is evolve, or die.