At the end of the day, PS Vue doesn’t offer anything compelling enough to acquire. A few subscribers and a bunch of licensing deals to broadcast TV over the Internet. Apple could get the same deals as Sony, Sling, Directv, Hulu, etc. Cable networks aren’t exactly being stingy about licensing.
Sony has only sold 75 million PS4's since it was released (https://www.businessinsider.com/ps4-playstation-4-lifetime-s...). Apple sells almost that many iPhones in a good quarter.
TVs are big and bulky and have something like an 8 year replacement cycle.