Is there any data class that store Desktop vs Laptop in Inventory Solution 7? Or any built-in filter/report?
Out of the box there is a report called "Count of Computers by Form Factor" in
Reports > Discovery and Inventory > Inventory > Cross-platform > Hardware > Form Factor
If you are looking for a filter, there are different posts around which discuss this (see below). Data is stored in the table: Inv_HW_Chassis.Chassis Package Type as an integer value: