Time will tell.
If accuracy and consistency can be improved with a 'Smooth Twist Barrel' it will not be long before rifled barrels are being phased out.
At present, current production barrels are better than most shooters are capable of shooting them.
Many current airguns in production are easily capable of producing tiny groups now. At airgun ranges any improvement in accuracy alone will not be obvious. Improvement will only be discernable when the minute of angle opens up at ranges far beyond the capabilities of an airgun.
It will take far more than a bloke on a step ladder shooting into a bucket of water, with a handful of bent pellets to convince me of the need to ditch my collection.