You have to be kidding..
Having for years supported, consulted, and developed for a product that took a sizeable margin of its install base value every year for support and maintenance, I have to tell you that enterprise customers will continually ask exactly what they're paying for when the installed software isn't changing, and quite often even when it is.
We would charmingly point out that they were paying for peace of mind (including critical bug fixes), additional platform support, and increased functionality if a new version was released. This had the advantage of being true (particularly earlier in the product's lifetime when it was being actively developed), not to mention that instant telephone support and emergency on site assistance for a niche product are not cheap.
Home users will ask exactly the same questions when they're paying tens of pounds rather than thousands; New Shiny Functionality is one possible way to quieten them down as they basically won't care about security and bug fixes, and have no legal duty to keep their systems secure.