Great question ... I've often wondered why I hadn't noticed the progression in AMPs ?
I would suggest the economic revolution and expansion of Asian countries and their peoples, particularly in relation to China, is largely responsible for what we see changing in Australia's business landscape ... of course, China isn't responsible for the relatively recent demise of local Video Rental stores, but we can now see new business evolving from those of the past.
For instance, I've been fascinated with the plethora of 'bubble tea' outlets in Perth, not to mention the Yum Cha and Hot Pot restaurants ... I've also noticed how many nail and beauty houses have appeared, mostly staffed by Vietnamese ladies ...
Change isn't always obvious ... and for me, it does seem to suddenly catch up with you.