USB-C to headphone jack adapters already exist and have for a while, i've used one, so it can happen and (and has).
USB-C for mobile usage can support headphone output via the same pins that a manufacturer may modify to support audio output, because essentially it's just replacing USB-A/B in that sense. Just like how Lightning is doing it. Because there is no expectation for a phone to output DisplayPort + USB 3.0 + other stuffs with its USB-C port.
For laptop/desktop usage, you can imagine the situation is a bit more different because DisplayPort + USB 3.0 + other things are in the card.
I don't believe that the Touch Bar is that significant with battery life. It has to power 3% more pixels on an OLED screen. While touch and the T1 must add to that power usage, I don't believe it can diminish battery by 10-20%, but i'm willing to be proven wrong.
It happens to the Apple Watch.
Seriously, it's a full-on computer in there, not just a display with touch controls. Careful coding is necessary. The MacBook Pros can take care of battery drain due to them having 2-3x the battery capacity of the MacBook. In which case, 10% battery drain on the MacBook is roughly only about 3% drain of the MacBook Pro. I think you can see where I'm going with this.
If the MacBook had a bigger battery like the MacBook Pros, it should be fine. Note how Apple had to squeeze more battery into the 2016 MacBook to improve battery life over the 2015 model. The MacBook is very limited in battery capacity compared to the bigger machines.
I agree with the cases for a 2nd USB-C port to be added. And why are you talking bout Kaby lake supporting 5K @60Hz? Isn't this already what we see from the new MacBook Pros? In which case native TB3 support isn't required.
Note: Skylake and Kaby Lake chips used in the MacBook Pros do support Thunderbolt 3, or more specifically, they have more high bandwidth data lanes available, which Apple is "hacking" in order to pull off 5K support on those chips.
The same thing won't happen to the Core M chips because of data lane limitation. Basically, the chips in the MacBook are nice but they ain't up to the same level as the ones used in the MacBook Pros, even though they're from the same generation/family of processors.
Sounds confident. While you may be right, the Gurman rumor refers to the Pro as specifically only getting a processor upgrade. In the same report, his MacBook update rumor is much more vague and seemingly leads me to believe an update is possible this year.
No, I'm sure the MacBook will get an upgrade next week, or some time this year. But if it comes with Kaby Lake then the improvement is less than what people are wishing for is all.
I'm hoping for a much more improved MacBook myself, and I'll most likely get the 2017 model despite the marginal improvements. But I've read up on enough information to not fool myself into expecting Apple to pull off magic with the next upgrade, like what people are wishing for here. Read back and you'll see the following things on the wish list:
1. Faster Processors
2. Faster Graphics
3. Better Battery Life
4. 2nd USB-C port that can do everything including cooking my breakfast for me (hah!)
5. Touch bar + touch ID miraculously not experiencing the battery drain issue of the 2016 rMBP line (I do use the 15" daily, by the way)
6. 5K @ 60Hz support
I mean... those are not unreasonable. But I think the main thing to note here is that Intel is not able to provide us with those things yet, and since Apple is relying on Intel (I would love to be proven wrong here) for most of those things, I think we should manage our expectations.
Either way, we'll probably know come next week.