Now that Windows 7 has been around could you provide me with good reasons to convince some doubtful clients I have who are still reluctant to switch from XP.
You're in luck! Because Windows 7 has been out for six months and we've been promoting it for almost a year, both Technet (http://technet.microsoft.com/en-us/default.aspx) and the Partner Learning Center (https://training.partner.microsoft.com) have hundreds of hours of Windows 7 training available - choose the topic...
In regard to your specific query; that is tough to answer because of the generic "reluctant to switch from XP" objection. We normally respond to the generic question with a generic answer:
To go further, you must determine exactly why they are reluctant to switch - given specific barriers, we have specific answers with Windows 7. We designed Windows 7 to address the objections customers and partners had around Windows Vista. The top five objections that I've heard include: