A while ago Microsoft announced Windows Server 2008 R2 and further Windows Server releases 64bit-only. (both x86-64 and IA64) Windows Server 2008 R2 Server Core is even the first Microsoft Windows Server to optionally include 32bit support. Most systems administrators have no problem with Microsoft going 64bit-only. Some systems administrators however feel they are forced to switch to 64bit Windows Server Operating Systems without a reason and without a choice.
My answer to these people is to investigate the issue and to make an inventory of possible problems when switching from a 32bit Windows Server Operating System to a 64bit Windows Server Operating System. Read here.