The Screen Density Conundrum

[Ken Corey]

I'll vote for scaling upon first load.

We've forgotten something here. When we get away from being tied to 
pixels, we can give our users more choice.

My 72 year old father will want the chrome of an application (as well as 
the content) visually much larger on the screen (pixel density and 
screen size notwithstanding) than I would...and my 9 year old son, with 
incredibly sharp eyes, can make out the pixels on a retina screen.

So, conceptually speaking here, we'd need to add a parameter to the end:

objSize = ((orgObjSize * screenSize)/pixelDensity) * userPreferredSize

As I have started using reading glasses, and my eyes get worse, this 
will become ever more of an issue, I suspect.

-Ken