Simplicity and Nintendo.
I don't think I need to explain why I included "Nintendo". Fact is, only Nintendo consoles have Nintendo games.
As for simplicity, I don't want to worry about the hardware or its ability to support the software or controllers, etc. I just want to plug it in and play a game. Then when technology wants to advance, I just buy one simple piece of hardware and associated games. No need to spend time determining the best upgrade/build/PC to be suitable for the next X years.