According to Fleabay and Amazon, the Oregon powersharp appears to be aimed at small saws, eg the ocassional user / hobby market. One Amazon one user said it was loose and the chain couldn't be properly tensioned, plus the chain oil feed wouldn't work. -This is just a 3rd party opinion, not mine, but it looks as if its early days for the concept and only time will tell if it proves trusty and popular. I'd guess pros will stick to the old technology, particularly as it seems to be a system available for only smaller saws.
Yes I am generally cynical about whizz bang new gadgets dreamed up by suited marketing managers who never step outside of the office, mainly because 30 years ago I used to be one. Can't believe anyone ever took in all the c**p we used to make up. (our exotic mystical jungle ingredient shampoos were concocted in an industrial estate in Basingstoke ).
There is obviously a useful role for small saws, for firewood, gardens, coppice and softwoods. Personally, given the big oak beasts I've got, even a 50cc stihl is a big underpowered, if you've tried going through 2 feet or more of seasoned oak you'd understand why !