Overall, then, the new Xbox One firmware update has changed things for the better, but you shouldn't expect an enormous boost in the quality of the final image. The unsightly sharpening filter has been consigned to the scrapheap of technological history, removing a 'feature' that really shouldn't have been there in the first place, but while the resulting improvement to picture quality is considerable and mostly positive, colour balance is still an issue, and the quality of the scaling itself is unchanged.
There is certainly room for improvement, then, but for now, with the sharpening filter completely gone, results will be good enough for most gamers. While improved scaling can rarely match a palpable boost in raw resolution, overall picture quality is a significant step up from what we were dealing with before, which is a definite win for owners of Microsoft's system.