Here's my two cents.
If we're talking about chargers and charging, which is the idea of this EU regulation, then what's being proposed is a little backwards.
How about standardizing on the connection on the power plug instead of the one on the phone? The way apple does it is they include with every iPhone, a syncing cable that is 30-pin on one end and male-USB on the other. An included power plug has a female-USB on the one end and the appropriate electrical plug on the other end.
Since smartphones typically need to sync to a computer, let the phone manufacturers use whatever connection they want on the phone side, as long as the sync cable has a standard USB plug on the other end that can be used for charging.
That way, you can charge your phone(s) using the included USB-power plug, a USB-car adapter, the USB port on your computer, or a USB port on a powered hub.
At some point, stop including the USB-power plug with the phone. Just include a syncing cable.
What's the advantage of this? Well, it let's manufacturers innovate on the device side. For instance, Apple can then choose to design the iPhone as they see fit. They don't have to decide between an adapter in the box (very kludgy), vs. the extra space required to put a micro-USB port in addition to the 30-pin connector...
It still doesn't make sense to make the power plug be microUSB. How many computers have a microUSB port? How many have a regular USB port?
As far as I know, there's no advantage to using microUSB on the power plug, since the electric prongs are going to determine the size of the power plug anyway. Why not make it regular USB and be done with it? That way, the syncing cable (which is going to be regular USB) can be used for power/charging? Otherwise, there's gonna be two cables in the box, one for charging and one for syncing, unless you have a y-cable that has both USB plugs.
???????
Yes, yes, yes, exactly!! The micro-USB plug idea is beyond stupid!! Who gives a flying F what type of connector is on the device?
All you need is a STANDARD USB plug on the other end of the 'syncing' cable, because standard USB ports are everywhere - on every computer manufactured currently, on many existing power bricks, in auto adapters, in power strips, in boats, in planes, in hotels, in airports... You can even buy electrical outlets that include USB ports along with the regular AC receptacles.
Micro-USB on the other hand is nowhere - on millions of portable devices, yes, but not on the power supplying end - and therein lies the problem. Now what we'll have is everyone filling up landfills with old chargers as they rush to buy the new mandated micro-USB charger, plus companies supplying a myriad of adapters to make their device comply with the new connector, and all these will eventually end up in landfills.
This mandate was brain-dead from the beginning... Stupidest thing I've heard of in technology in a long, long time, perhaps ever.