For our new project, we are currently looking for latest "standard" layout. It is a business webapp which includes lot of master-detail screens/forms.
In our previous projects, we have extensively used horizontal tabs like JQuery UI Tabs.
I remember old version (5) of Dynamics CRM also utilised similar approach but in there latest 2011 version, they have replaced layout to include vertical tabs like this.
I also noticed SalesForce has also related information on vertical "tab" which is essentially multiple sections on long long page. I could not find much discussion about this sort of decision? Note that MS/SF has separate layouts for mobile & surely they are not expecting businesses to use tablets.
Is everyone moving towards vertical layout when screens are becoming wider? Is there any reason for this shift?
Edit: This is what I am talking about, the question is why?