I use the following script to get the tables having identity values....

SELECT table_name

      ,column_name

      ,IDENT_CURRENT(table_name) as Identity_value

      ,data_type

 FROM information_schema.columns

WHERE COLUMNPROPERTY(OBJECT_ID(table_name),column_name,'IsIdentity')=1

ORDER BY table_name

Why bother with system tables, when you can get the same with schema view and functions?