Kirbylux, we can certainly agree to disagree but the technology is not here now to make a standard lightweight replacement upright DEEP cleaning vacuum that will do a whole house at once and wipe out the corded vacuum market as dyson suggests. Heck my 1700 sq ft home takes an hour to do the floors and 90% is plush carpet - it takes an hour to do. The model you mentioned already had limits, so that is not a full replacement. I would like a real test on an hour of run time with it - sounds like marketing to me - maybe 10% berber carpet in their test? Will it still be an hour after one year? Soft bristles will not get hair and lint out of plush deep carpet either. The tech is not too far off, however, it will take a long while to mature. I did forget to mention COST, which will be the biggest factor. People will still want decent performing $100 vacs and that will not get a GOOD cordless any time soon. Maybe 600-1000 might but very few will take that kind of risk.
To Tolivacs post, cordless lawnmowers have been out for a while but I have only seen one ever being used, and that was a neighbor across the street for a year. He could only do one half of the yard per day. Cordless saws, blowers and trimmers are great - I use them myself and love em for short jobs. However corded models are still in big demand. Why? Limitations on battery life, cost, weight, cost of batteries, etc. I still have corded models for big jobs.
Then there is the cost of replacement batteries, and potential safety issues with lithium batteries, so the development still has a way to go.
Heck, I was ready to convert my old go-kart over to electric after seeing some online videos, until I saw what it would cost! Perhaps some day it will become affordable.
There will be a day a good cordless vac is made. However, corded ones are not going away anytime soon, if at all. Lastly, I have never seen a lawn or cleaning service using a cordless product, so they will keep a demand for corded or gas tools.
Anyway take it all for what you paid for it - time will surely tell...