I think the writer is jumping to a conclusion based off of a misunderstanding. It is a little off to assume that the removal of the micro-USB cover would also mean the removal of the micro-USB connector. And the wireless charging assumption was based off of that.
"The removal of the USB connector would imply the use of wireless charging – a system that has already been demonstrated by products such as HP's TouchPad, which had a wireless charging system. A Nokia spokesman said the company declined to comment on future product features."
The micro-USB isn't going anywhere. It would be nice to have a wireless charging option. But Nokia didn't really hint at it. The "hint" is just based off of a misunderstanding.