There's that toy word again...can't count the number of times the iPhone and iPad were called "toys".
There is a strong correlation which shows that a successful, disruptive product must initially be met with resistance from naysayers otherwise it is not likely to be successful. If everyone accepts it from day 1 then the product is probably not truly disruptive. The product must make some people uncomfortable initially. As you say, we saw this with the iPhone and iPad and even the iPod.
Reading the scathing posts from the naysayers in this thread just makes me even more certain that the Watch will be a huge success.