The pixels have doubled, and I will be honest, it has been a confusing stretch.
High density screens are here, and everything I have ever made suddenly looks soft on them. Which means everything has to be made twice.
We still cannot put real type on the web with any reliability. Browsers do not support the faces I want, so a custom headline is an image, and always has been. Now that image has to exist at two sizes. So does every icon, every button, every texture.
It is a doubling of everything. Two of each file, two exports, two things to keep in step, two chances to make a mistake, and only one of them showing on whichever screen you happen to be sitting at.
The way out, I think, is to stop shipping pictures of things and start shipping the instructions for drawing them. Vector. Scalable. Resolution independent. A shape that does not care how many pixels you have. That is coming, and I hope it comes soon.
I am not enjoying this stretch, and I am learning a great deal from it, which is usually how it goes. The lesson is that anything you export at a fixed size is a promise about a screen that will not exist in three years. I would like to stop making that promise.