they are most definitely going to sell more AppleWatches than iPods, i have no doubts about that, but i don't believe the AppleWatch is going to be synonomous for its product category like the iPad and the iPod were. especially since "AppleWatch" isn't as catchy of a branding as the aforementioned devices.
Apple is a huge brand. Add "Watch" ... not even SMARTwatch... just WATCH. It doesn't get much simpler than that unless you're an armchair CEO who thinks it should have been called the iWatch.
"Apple Watch" is so much simpler than the geeky Android Wear names: Moto 360, LG G Watch R and ASUS ZenWatch, Sony Smartwatch 3, Samsung Gear Live, LG Watch Urbane. Even Pebble Time is kind of in trouble, due to the lack of weight carried by the Pebble brand outside the million owners of Pebble products.
thing is, the amount of times i've needed to reply to an email or text with a simple 'yes no' answer is maybe 2-3 times in the past year. And I've also used siri to write out a text while driving... once ever, just to test that gimmick out.
Going to the iphone 6+, i'd expected more 'life style changes', but I just ended up doing the same stuff as before, but 2 handed. Not a big deal.
Sorry to hear you haven't yet realized all the benefits of a voice assistant. Instead of focusing your eyes and hands on a phone for 15-30 seconds, just hold a button down and say what you want in 3. I use Siri a dozen times per day to call people by name or read off a number on a business card, create reminders and calendar events, add items to my shopping note, launch apps, check weather, do math calculations, get directions, set alarms and timers, perform google searches, send detailed texts, and I use the speech to text function to dictate text system-wide pretty much any time I have more than one word to say. The benefits are especially appreciated when I'm preparing food, carrying stuff, working, walking, etc. It's a great companion for a busy lifestyle.
With an Apple Watch, it's like interacting with thin air.