It performs better on modern hardware and fixes a number of issues in the original game. This is generally the purpose of source ports. It also simplifies moddi

It performs better on modern hardware and fixes a number of issues in the original game. This is generally the purpose of source ports. It also simplifies modding, as you can use the launcher to enable/disable mods as you like. Graphics are also improved. For example: the water effects look much more realistic in OpenMW. Fun fact: OpenMW now stands for ‘Open Microwave’