Easiest way I have found to watch Netflix. Also it's pretty nice for renting movies. I used to rent from Amazon and play off my ps3, but I have started renting from google play and throwing it on the chromecast. I also like that frequent guests(girlfriend) to my house can use it without having to ask me.

It sounds like with your current set up a chromecast might only be slightly more convenient, so you might not be missing much.