loading resources and progress bar

So you have a list of resources to load. In a loop, you load a resource and you update the progress bar to indicate you have done some part of the work. I don't see any problems. Why would you need threads?

omg so easy!
thanks dude didnt even think about something that easy :P

Loading resources could be highly parallelizable, depending on how much CPU work is needed to process a given resource before it's usable. For example, if your texture data is compressed, then resource loading needs both hard drive and CPU time. In that situation, threads could improve the speed at which resources are loaded by letting one thread use the CPU while another thread is blocked on the HD, for example.

However, the basic concept of a loading bar is as Alvaro described.