If the belt is like standard belt drives (I need to look further into this, not sure if Ikea cheaped out or not), it should actually stand up to time better than a chain would. Belts are simply carbon cord embedded in a molded casing of nylon and polyurethane, and, more importantly, do not have any moving parts or linkages. It's just a belt! So you don't have to worry about the metal pitting over time or road salt settling in and destroying your drivetrain like you would with a traditional metal chain. This is more important to the European market where bicycle riders my not have cars, but owning a bike that you aren't afraid of taking out in the rain is another benefit of the belt.

My biggest concern though is that like all parts, the belt will fail eventually. A quick look online shows that new belts cost around $250, over half of the retail price of this bike!