It's a little hard to call it the end for Microsoft <i>and other proprietary efforts</i>, when the lion's share of Microsoft's marketshare loss has been picked up by Apple.
The fun part is, if Linux grows then all the other open source platforms (Solaris, the BSDs etc.) also grow (open standards, open source drivers, etc).
i hope so. i'm looking forwards to a livelier collaborative eco-system of open-source or at least open-api modules made by smaller teams rather than h4444ge corporate efforts. i'm not even sure that the economy of scale is true, but even if it does it only seems to benefit the tip of the iceberg.