Everyone needs to realize that the Droid is not going to be receiving the 2.1 OS anytime soon. Why? You ask? Because there needs to be a selling point for the nexus one when it hits Verizon.
The selling point is not so much of 2.1 for the N1, but the hardware. People have a choice whether they want a slide out physical qwerty keyboard or more of a slim-form factor without the physical keyboard. Also with the AMOLED screen or Droid's slightly higher-res screen. Between the Droid and Nexus One for Verizon is merely choice. Regardless of the N1, people will buy the Droid or the N1 regardless of 2.1. Just like people were still buying the HTC Eris despite it having 1.6 due to the form factor and all.
The sales don't reflect this. I would've picked the Eris if it ran and was able (inside hardware ) to run 2.0. A person that bought the Droid is not the same demographic that bought the Eris. This thread is a testament to that.
But this thread isn't the majority or speaks for the average consumer. In the end, people will generally want something that is more new and stylish because its the current trend. When the Nexus One is released, it will already be the selling point regardless if Droid will have 2.1 or not.