How does this compare to current li-ion batteries?
Saying you can charge it in 10 minutes is fairly irrelevant, if you have a 5Wh battery and you charge it with a charger capable of producing 5W (as is the case with all modern USB phone chargers) it will take at least an hour to charge. The only way to make it charge quicker is to use a bigger charger. The battery on my current phone is 8.7Wh, if the new style battery provides 3x that then that's 26.1Wh. To charge that with my 5W charger will take at least 5h12'. To get the charge time down to 10 minutes would take a 150W charger, i.e. something nearly 3 times the size of most laptop chargers.
The useful thing here is if they really have managed to treble the capacity but if this comes to market we'll see HTC produce phones with the same size batteries that last longer which will be ignored by the buying public. Then Apple will release an iPhone with the same battery life but the smaller size of battery will allow them to make the phone thinner. Then Samsung will copy Apple's lead and all we will have gained are slightly lighter phones that still need charging every day.