This term of designing a componet to your specification is really not accurate. You create comps through a large tech tree which games like SEIV has and which can be modded to make it a much larger tree. In real terms SM Mode is a a way of useing a round-about way to enter a cheat codes rather than being called modding. For example you can give yourself a extra Space yard. In SEIV you can give a race a unigue tech tree that other raves to not have. The values in research times can be changed for all comps & Facilitys, you can not do this with Aurora. Plus many other things that can not be done with Aurora.
Next. The war gaming community is a tiny part of computer users. The laptop can do almost anything a desktop can do plus not take up a lot of space and are portable. Pc desktop sales for several years have been droping, while laptops & notebooks are booming. I have a 3 GHZ prcessor desktop and will be replacing it with a laptop. I live in a apartment where space is valuable. Almost everyone I know is moving away from the desktop including the schools. The designer mode is password protected, an steve will only give too the few of his choosing. It will never become apart of the game. I know this because it was asked on the Aurora forum.
The SM mod does not effect the NPR's an a way people think it does . A recent forum post explains this. If you give yourself certain advandages the newly created NPR's may recieve them to.
This reuters site talks about the end of the PC.
http://www.reuters.com/article/idUSTRE50601320090107