I would say there is no need to switch – at least not right away. TVs have multiple inputs and streaming devices are inexpensive and not mutually exclusive, so you can easily get one (or several), try them out, and see which you prefer. I have a Roku, and an Onn Android box, and my satellite receiver and Blue Ray player can stream as well. Of course, the services available on the last two are far fewer than the dedicated streaming boxes, but I mentioned them to point out that you can connect pretty much as many streaming things as you wish.
I prefer the Roku, but someone on an Android TV forum is likely to tell you he prefers the Android device.