Do you need to purchase a PlayStation unit (a PS4, for instance) to stream channels through Vue? Sorry if it’s a stupid question; I just have no idea and have no knowledge about video game systems.
You do not need to purchase a PlayStation unit to stream channels with PS Vue. The Amazon Fire TV Stick ($40) works great. I have never tried a Play Station unit but my research indicates that the Fire TV Stick works better. Unless you want to also play games, I would suggest the Fire TV Stick. A key feature of the Fire TV Stick is the skip function to skip through commercials rather than just fast forward through them.