If this GDP result is roughly correct (it likely will be), China will accomplish something this year that no other country has accomplished in more than 100 years, which is to be at 75% GDP of the US. Every year from now on until China overtakes the US in absolute GDP terms, it will set a new record in this aspect. Japan at its peak was only about slightly less than 70% of US GDP. The Soviets did not even come close to that.
		
		
	 
Nominal GDP is an important metric; it's important at least from a psychological standpoint. But China has surpassed the US in many equally important metrics, and achieved levels that Japan or the Soviet Union could not even dreamed of either in absolute or in relative terms to the US.
1. China's economy measured by PPP GDP surpassed that of the US in 2014.
2. China's industrial output surpassed that of the US back in 2010; it is now equal the the combined output of the US, Japan and Germany, next three largest industrial powers.
3. China's annual steel output exceeds the combined output of the rest of the world combined.
4. China's annual auto production units consist of 28% of the world total, and exceeds the combined production units of the US, Japan and Germany, the next three largest auto production countries.
...... There are many more such metrics, which are considered as the level of industrialization. China is far away the world's largest industrial country, by aggregate measures.
We can also look at a few of the metrics for service industries.
5. The domestic passenger air traffic volume in 2018. The domestic US market is the world’s largest single market, with almost 590 million passenger journeys undertaken in 2018. Domestic China comes a close second, with 515 million.  Incrementally, China added most domestic passenger journeys globally, by 50 millions, while the US added the second most by 30 million. China has by far the most international travelers , about 130 million tourists annual. It must be noted though that passenger travel much more by rail in China while the US drives more.
6. Box office revenues in 2018. The US takes the lead at $11.08 billion, while China at the second at $9.15 billion. China should take the lead in a few years (China already leads this year, but let's not count this year...).
7. Retail sales. China and the US should be neck-to-neck in this category currently.
Undoubtedly, the US continues to lead in the majority of the categories in per capita, but we're talking about the aggregate numbers here.
Finally, in the New Economy department, the US and China are a wash and dominate the rest of the world, each leads in respective areas, such as e-commerce, digital payments, streaming media, cloud computing, 5G, etc. Overall, the US has the edge in basic research and foundational technologies, but China has the advantage in application scale, speed, scope and infrastructure. I see China will gradually leads the US overall.
So nominal GDP is but a game, but China is expected to win the game and claims the unquestionable title of the world's #1 economy.