If I have an Apple iPhone, I can choose whatever watch I want (Apple Watch, Pebble, Microsoft Band or Google Wear)...
If I have an Android Phone, my options are limited. The Apple Watch is not compatible with my phone, so I can't get it. I only have 3 so-so options, compared to an iPhone user, which has 4 glorious options.
Why would anyone want to be LIMITED with an Android Phone then? I'd rather choose the phone that works with everything, not one that is LIMITED. (Same goes for iTunes, too - Android phones can't use it either..... man, Android is SOOOO limited)
Android is only limited if you are heavily invested in the Apple ecosystem and want all iOS devices.
I use several great apps on my Android that aren't available on iPhone. Does that mean Apple is limited? No. And keep in mind some of these apps are Google apps. And on Android, I'm not limited to choosing which email or browser app is my default, on iOS I am stuck on what Apple has chosen to be the default.
Android is only limited in the smartwatch market if you want the Apple Watch as the only other major smartwatch competitor is Pebble, and that works on iOS and Android. I'm not sure what other major competitors there really are in the smartwatch world, outside of Apple, Android, and Pebble though. You may think some of these Android smartwatches are so-so, but I got the LG Watch and have been pretty happy with it. If it makes me happy, how is that so-so? I don't like what I've seen out of the Apple smartwatch, that doesn't mean it's so-so.
I got an Android smartwatch a few months back, but with the recent developments with Pebble, I'd much rather have that than an Android or Apple smartwatch. I am most certainly not limited from that standpoint given Pebble is "universal."
And even when I had a "dumb" phone with an iPod Touch, I avoided using iTunes at all costs. I actually use a Chromebook quite frequently, and I have an iPod Nano. I sure don't feel limited because I can't use iTunes on there. I wouldn't even have iTunes installed on my Windows machine if it weren't for the fact that we have a family iTunes account so we can all access the same movies purchased through there by him and my brother. When I eventually get a Macbook Air in a few months, I also don't intend to use iTunes for anything other than that.