Is std::async().... async?

gistfile1.txt

#include "stdafx.h"
#include <iostream>
#include <thread>
#include <future>
#include <chrono>


using namespace std;
using namespace std::chrono;


int main()
{
	cout << "Main thread: " << std::this_thread::get_id() << endl;
	auto f = async([] {
		unsigned int big = std::numeric_limits<unsigned int>::max();
		while(big != 0) {
			big--;
			if(big == 0) {
				cout << "Worker thread: " << std::this_thread::get_id() << endl;
			}

			this_thread::sleep_for(milliseconds(10));
		}
	});
	f.get();
	return 0;
}