Thin-clients: THE Solution to the Security problem

[sf_mail_sbm () yahoo com]

Dear List,

Currently managing IT Security involves ensuring that Workstations are properly patched, antivirus are installed on all 
the machines & updates are installed correctly

Now if we replace all of these PCs with thin-clients, whereby they will access servers (may be Terminal Servers) to get 
their mails, get Web access, does it not eliminate the potentially large pool of 'vulnerable' machines, and hence 
greatly decrease the Risk Exposure of an organisation's network?

Is this the solution to manage Security more effectively?