Um, this is not exactly new.... The big linux companies have been heavily pushing migration from unix to linux from the begining. Just go to redhat.com and look at their whitepapers about migration

http://www.redhat.com/solutions/info...LinuxMigration

There are none there about migrating from microsoft...

Perhaps there should be yes, but this is not a new tactic, or a change in direction, the major players have been pushing this very hard for a while now.