What's the benefit of going 64 bit?

I have been deploying 64 bit servers wherever I can for customers as of late. I truly believe that while issues may be experienced with backup solutions and other 3rd party applications, these issues will be resolved and the benefits and future expandability offered by this platform make it worth addressing the pain points today. A common question I receive from customers, "What's the benefit?". I found we have a great 64 bit resource center that has a good white paper to help answer this question.

 

https://www.microsoft.com/servers/64bit/whitepapers.mspx