If you were to purchase a desktop size Pick and Place machine, how would you prefer it to be controlled?
With an embedded Linux computer (Raspberry Pi 2 or similar). You need to add monitor/keyboard/mouse or you can control it over VNC if you prefer. Works out of the box, no configuration. Can be restored to original condition by swapping a memory card.
Use your own Windows PC. (Desktop or laptop.) You will need to install software and drivers and do some configuration. Same cost as option 1.
With a preconfigured Windows laptop included. Works out of the box, no configuration. Can be restored to original condition by running a recovery disk. Adds the cost of a laptop to the cost of the PNP.