Re: Watching with interest
That is a valid point, and one that I'm sure Valve will be trying to address.
I assume there will be some kind of certification process, which results in each different off the shelf Steambox being given a grade. You then only buy games that will run on certified machines of your grade, and game creators will have a much better idea of the range of machines they need to target. That will remove any risk that a given game might not run on your machine, while allowing you to upgrade your machine later with more powerful components, should you wish.
A winning combination of it just works with I can make my machine more powerful as technology evolves and components become cheaper.
The use of a dedicated OS potentially allows for graphics drivers and possibly even scheduling algorithms that are fine tuned for game playing, an advantage that standard Windows machines do not offer.