I don't like voice-triggered functions. I am one of those people who would rather type than talk, and I think it's weird to talk to your machines. Maybe one day it will be socially acceptable to talk to your machines, but even so I doubt I'd enjoy it.
That said, it takes about 5 minutes of using Google now and Siri to see which one is better--it's not Siri. Unfortunately for Apple, it's not even close.
What you're finding is that there is a fundamental difference between the degree of difficulty of things that Google attempts vs the things that Apple attempts. There just aren't that many folks who can do the artificial intelligence stuff well, and they all work at Google and Apple can't hire enough of them away. There are alot of people who can do UI design and vertical integration and supply chain stuff well, compared to the artificial intelligence people. This is why you're seeing Google make leaps and bounds while Apple is more or less doing the same thing that it's always done--refine, polish, tweak, and tweak some more.
My personal opinion is that the artificial intelligence stuff is just inherently harder and not as many people have a knack for it, and it's less teachable. But good UI design and supply chain management and industrial design are more mature fields, or there are more people interested in it, or it's inherently an easier field to master, or all of these things...but whatever the cause, there's a much bigger supply of people with these talents.
If you want to see where the puck is heading, you look at Google these days. Apple will need to fundamentally change the culture of the company if they wish to catch Google. It can't be so concerned with physical design and new materials etc and making devices thinner and thinner. This is happening at other makers too. Samsung, LG, HTC all make comparably thin and in some cases, better built devices. it's not a good bet to stake the future of your company on. At some point forward-looking features that really work well are going to be the norm, and if Google pulls off what it looks like they are on the verge of doing, people will switch over to what works best. Everyone will do it. A culture of cool and nice design is a sustainable business, but it's very susceptible to the whims of pop culture. True forward-thinking substance, however, is a much better business bet. In Apple's defense, maybe I and everyone else keep superimposing this idea that Apple needs to stay #1 to validate itself as a company, when they never said their goal is to become the largest company with the largest market share. They want to make the best products that change lives. But I would not at all be surprised if in the future it's Google who comes up with the next leaps forward, and Apple ends up polishing the crap out of them and makes money that way. The perfect company would be if Google and Apple combined efforts. Google makes the engine, and Apple does the UI and hardware design.
Above all over this little paragraph of ideas, no company stays on top forever. None. I can't say how Google/Apple/FB,Amazon will fall, but fall they will. I give it 20 years tops. No one is invincible. Microsoft, IBM, Carnegie, Rockefellers Standard Oil, they all fell. It'll happen eventually, so perhaps we should think of peak success more along the lines of athletic careers--10-15 years on top is a mighty and maximum ceiling these days for a company, and to fall back to earth after that is no shame.