Hi Ady,
My question is what are the additional advantages of integrating SMP server when developing Fiori application with Desktop only in target.
Are you referring to the Fiori web applications running in desktop browser or a native/hybrid app for a desktop? If your target is only desktop you don't need SMP since the Fiori apps gives good performance in a desktop browser.
First of all, how we can register such kind of applications in SMP server (3.0 SP05) and what are the deployment mechanism for Fiori apps from SMP?
You have to use Kapsel logon plugin to register your Fiori app with SMP server after creating an application SMP admin cockpit (More info: SAP Fiori Client specifically Proxying the Fiori Client through an SMP 3.0 Server).
To distribute the app to the device you can use an MDM solution like SAP Mobile Secure (Mobile Secure (Afaria) - Enablement Events).
Regards, Midhun
SAP Technology RIG