The new macbook is for people who are 100% focussed on mobility, and
nothing else. That is a small niche of people. Think of it like an non-touch iPad with a keyboard, and you kind of have a sense of its purpose. The vision for the Macbook is "Wireless".
Just looking at your use cases though:
o Charging - the idea is that you have battery life in the 8+ hour range, so that when you are connected to a projector, you don't need to be charging.
o Reading a presentation off a USB key while connected to a projector - I've been doing that exact thing for the last 3 years, on an almost weekly basis - and 100% of the time I borrow the USB key for a second, and then hand it back to the owner (or put it in my USB wallet). The important thing there is sufficient local storage.
But yes - The MacBook is probably not for you, and it's definitely not for me.
I'm just psyched that my next MacBook Air (or whatever they call it - maybe I'll have to move upstream to the Macbook Pro if they dump the "Air" line) will have three USB capable ports instead of the current 2 + 1 Thunderbolt.
