It's likely that the ability to customize, swap parts or run any software you wish will be traded off with being a simple box with console UI. Which is fine, until the price comes in. $1200-2k for a box destined to become dated with no way to limp it along with upgrades will only seem appealing to a niche. They know this which is why their success has been de-coupled from hardware with it. Wanna pay for a niche product? Great. Don't? Also great, that's why Halo is multiplat.