I know people are going to be angry about this... But like it or not, this has to happen sooner or later, and there is never really going to be a better time than now - waiting won't make it any easier. The 3.5mm jack takes up a significant amount of space, and on a small device, that space matters. Keeping the headphone jack is just delaying the inevitable.
This reminds me of when people were slamming Apple for not adding Blu-Ray to Mac. Steve asserted that streaming was the future, and look now... who really wants a blu-ray drive? Yes, it sucked for a couple of years while we transition to newer technology, but there's not way around that. The headphone issue is really the same philosophy - simpler products, wireless when possible. I have no doubt that after couple of years (which may include some transition pains), people will fully support moving on from the legacy 3.5mm jack.