Finally
The time has come, esp with more Browser Centric Intranet, Cloud and Public Internet to seriously look at Linux as a Migration option.
Microsoft has basically lost the plot since Server 2003.
Lock in to Exchange & Outlook non-email functions and then Sharepoint was among the worst Corporate decisions, allowing MS to hold Business customers hostage.
For me MS 1981 - 2014 RIP, avid supporter of NTFS, and NT since NT3.5 (Our first deployments just before NT3.51 Release). One of the most important IT vendors for Business has worked hard to become an irrelevant Consumer Appliance company.
Some more Boutique Companies may go entirely Mac + Linux Servers, but I fear the Mac will be ditched for a larger iPad with keyboard and the Mac "all in one" monitors will also migrate to ARM and iOS. Cost reduction, same end user price and more Apple Control / iTunes delivery etc.
There are old Windows applications I need, I will look harder for Linux alternatives and as final resort a Virtual Machine with XP (no Internet) or WINE.
Currently 2014- 2015 is looking unpleasant IT wise. Win7 and especially Win 8 simply isn't a viable alternative to XP. Still running Skype 3.8 on XP. Skype 6.10 on Win7 using about 90% CPU. This seems to be a Skype Issue since about 6.7
Some applications bought between 1999 and 2010 still in use won't even run at all on Win7, never mind Win8. Often newer versions more buggy, no worthwhile extra features and the upgrade cost of all these is much more than cost of a new Workstation.