There is a valid argument that says that the PS3 and Xbone will be the last consoles because PCs are more powerful, will be cheaper and can be understood by idiots. Valve and Steam are aware of this argument. This is why they're reaching out to families.
The digital gaming portal has decided that Microsoft's idea of Family game sharing on Xbox One is a good way to capture and entire household of people. With the age of gamers rising and people born in the 1980s having their own kids but still gaming, this makes huge sense, ergo: Steam Family Sharing.
"Steam Family Sharing allows close friends and family members to play one another's games while earning their own Steam achievements and saving their own game progress to the Steam cloud. It's all enabled by authorizing a shared computer," says the blurb.More info here.