Automatically generating a UI from a domain may please a programmer but isn't likely to please a user. That's how you get UIs like the one Salesforce has. That

Automatically generating a UI from a domain may please a programmer but isn't likely to please a user. That's how you get UIs like the one Salesforce has. That could be the right choice in some situations -- it certainly worked out well for Salesforce and allowing extensibility in their model. However if you want to build an app with consumer usability you'll be putting a lot of unique development effort into your view layer.