you cant look at the WHOLE of the US in terms of numbers. If they arent testing as many in NYC then those numbers will be lower, affecting the overall numbers of the US. Same for other parts of the US.
The spikes remain - thats indisputable as evidenced by Texas, Arizona and FL numbers. And if infected folks travel to other cities and spread, with the 2 week window for symptoms, any number of cities could see a spike in weeks to come.
Thats the real issue with COVID - the incubation period.