The dropped charges follow a series of interviews by Swedish prosecutor Ingrid Isgren at the Ecuadorian embassy. That came about after terse negotiations between Ecuador, Sweden and Assange, following pressure inside and outside the nation. Last year, the UN declared Assange's asylum to be tantamount to an "arbitrary detention," and recommended he walk free. The government of Ecuador also called Sweden's prosecution of Assange a "serious failure."
The Ecuadorian embassy is currently guarded around the clock by London's Metropolitan Police Service (MPS) to prevent Assange from escaping. Police released a statement saying that Assange "remains wanted for a much less serious offense," namely, failing to surrender to the court in June, 2012, and would still face "immediate arrest." However, it said that it would now provide a "proportionate" level of resources, meaning it may stand down much of its guard.
Assange posted the above image to his Twitter account shortly after the news was announced. It finally opens the possibility he could leave his tiny quarters in the embassy near Hyde Park in London. His lawyers have said, however, that he wouldn't part unless the UK government guarantees he won't be extradited to the US over spying charges linked to his WikiLeaks activities.
Indeed, last month, the US Department of Justice said that it is weighing charges against Assange and others over the 2010 release of thousands of US government documents by Chelsea Manning, and a more recent dump of CIA hacking tools. CIA director Mike Pompeo recently called Wikileaks a "hostile intelligence service" that's a threat to US national security.