My thoughts on this are that a handful of these companies will stick around, but that none will increase sales, and probably sales will fall. Reason for my opinion is that first, the door to door method of sales is dead. Most communities don't allow it without a permit, and even if you jump through that hoop most people HATE door to door sales people of any kind. I've seen so much negativity regarding them on the FB page for my community. They literally post pics of the sales people and shame them online. Second, the brick and mortar shops selling vacs are typically located in older buildings, in older parts of town. Here those buildings are being demolished and replaced with buildings these mom and pop shops cannot afford. And the biggest reason I feel like sales of these machines will falter is that anyone interested in a heavy but well built vac will likely buy a used one for a fraction of the price of new. Case in point: I have had 3 Kirbys. First one I bought for $80 from an old lady who was conned into buying it for $1,200. The sales person should have known she was too weak to use it, but he sold it anyway, and it was used once when I bought it. IT was a G4 with all the attachments. Then one day I was vacuuming and hit something with the head, which broke off one of the 2 metal tabs which hold it to the machine. A replacement head was over $100, but I found a complete G4 Diamond for $60 so I bought that instead. It was well used, but worked like new. Then I saw a literally brand new Sentria for sale for $40, I bought that too but ended up selling it for $100. My point is, there are way too many nearly new machines available for $100 or less, there is no way anyone with half a brain would spend $1,000 or more for basically the same machine. And that brings me to my final point, these machines are basically the same. If you look at the Kirby you can go back 20, maybe 30 years and they are all the same. Yeah they change up the colors, maybe make the metal look more streamlined, but it's the same, there isn't any reason to upgrade. Even the Rainbow is basically the same going back to the beginning. Yeah they added a second speed, but who buys a vacuum to "clean the air"?? It's a cool marketing trick, but I don't know anyone running a Rainbow 24 hours a day on low speed to clean their air. And on top of all that you got people who can't see beyond Dyson for whatever reason.