I may be wrong, but I think you are falling into the typical false technological assumption that a new technology will revolutionize everything just because it becomes available. I mean, look at computers. Even though they are becoming ubiquitous there are not computers in every object we use every day. A lot of our home equipment is still based on "stupid" electronics because it's good enough in most cases.
3D printers will become more common, more reliable and cheaper as the market develops, but when you can order something on Amazon for 3 dollars and have it delivered at your door in one day, there is a strong competition as to what is the best/most effortless way to get the thing in question. If your goal is to make unique objects that you cannot find anywhere, then, sure, 3d printers are the future, but most of us are living in environments where many things have been standardized, and products fitting these standards are readily available.
In reality, uniqueness is overrated. Given a really large pool of objects to choose from(which are manufactured in mid quantities) , there's not a lot of consumer need for unique objects.
The largest market consumers do need unique objects is the healthcare market. But the economics there are totally different. for example 3d printing of dental crowns existed for a long time , but it doesn't(yet) captured the market with lower cost solutions(although it certainly has the power to do so, technically).