Just tell me how it will make my life easier and where the value proposition is for me to move to it. 

Why would I move from XP when I am happy with it and have everything just as I want it right now?
Where will I see performance benefits and what is the cost of those benefits in terms of hardware upgrade costs?
How can the costs of upgrade be justified to management?
How do I know if my harware has drivers that are guarunteed to work?
Can I trust it to work with my current softwares that I have running in XP?