Single Clustered Index Concept
When you create the clustered index on SampleView, SQL Server has to materialize the data in the index.  Normally, a view does not have a separate copy of the data.  It is normally just a stored query.  An indexed view changes that.

Since the indexed view has a separate copy of the data, it can be sorted in whatever way you'd like.  Normally, of course, you wouldn't have an indexed view that simply replicates all the data in a table.  You'd normally only create an indexed view if you're going to materialize a subset of data based on various conditions or if you're going to materialize some aggregate data.