To be honest i think Smart Watches are pointless and are a fad.
What are YOU going use your Smart Watch for rather than checking the time?? because Smart Watches are definitely too SMALL for daily uses like web browsing, playing games lots more.
I do think they are too small for doing much other than replying back to texts or answering a call or getting notifications.
I have a Gear S and honestly, other than the stock apps such as S Health, I don't use any other apps on it.
My boss asked me what apps I had on my watch and I told him I haven't installed anything and just what it came with because the screen is just too small to do much anything else.
You aren't going to check websites on it.
My watches data plan came with 500MB per month and I think I rarely used more than 50.