Sometime when I was a teenager, it occurred to me that every collection, of anything, that I'd ever seen, was dusty. That alone led me to one of the most useful rules of thumb I've ever embraced: don't own anything that just collects dust. And my home decor pretty well reflects this ;) I decorate a lot with candles. Dusty? Burn it. Same idea with dried flowers. If it gets too dusty? Throw it away, dry some new ones, ta da, decor. It's funny, I get a lot of compliments on my home decor, when most of it is based around me being lazy.
I wonder what will happen to all those porcelain dolls and stuffed animals everyone is hoarding, as the older generations die? We're beginning to reach the end of life for the first generations of consumers in a cheap consumption society. It'll be interesting to see how it all goes. A lot of landfills, I'm sure, sadly enough.