I'm going to assume all of the people in this thread posting variants on "Here is what the market currently looks like, why would anyone bother doing anything different to that because the current status quo will never ever change for any reason" don't invest in the stock market and aren't senior enough at whatever jobs they do to have to be aware of SWOT analyses.
Let me break it down for you;
- Right now Windows has a kung-fu death grip monopoly on the PC gaming industry. If anything happens to dethrone MS, or if MS make any changes themselves to adversely affect gaming (and why would they? It's not like they have some gaming specific hardware they want to push), and company whose primary source of operations is PC gaming is fucked.
- Right now there is reluctance from embedded customers to switch platforms, due to their amassed libraries and reluctance to give that all away (for more of this, watch this holiday seasons NPDs)
- Right now Linux in particular and Open Source in general find it hard to appeal to content producers to put their software onto, as the market is perceived as 'niche', 'fragmented' and 'freeloaders'. A lot of marketing money has been spent to help foster this perception ("Get the facts!").
Here's what SteamOS brings to the table;
- A mature and well respected digital store front with a loyal customer base (why would Amazon sell their own apps on their own store? There's already a Google store on Android!). Why is this important? Because it provides a service that allows people who want to buy content a trusted way to buy that content.
This is good for both consumers and producers; consumers know if their machine can run SteamOS, it can run the 'app' they buy from the SteamOS 'appstore'.
Producers know products they sell on the 'SteamOS appstore' are piracy free, and can also see how many users the SteamOS appstore has to estimate potential sales in advance. Or indeed the value of porting costs of a product already available elsewhere.
- A method of accessing prior content; this is obviously a stop-gap solution, but it solves the whole "why would I buy a steambox if I already have a Pc and loads of games" question, until software and hardware solutions which don't yet exist do.
- Independence from Windows at a company level; the biggest factor by far. With this, Valve are no longer entirely entwined in the fate of MS and whatever it is they're choosing to do with regards to Pc gaming this month.
This independence is also there for others who might not be as super-peachy-keen on Windows as some of you are to join in on.