One of the great things about this painting is how it is a totally different experience at different distances. From a distance, the sense of right-to-left motion is palpable. Get closer, and figures seem to pop out of it. But really close, you can no longer see the entire painting, but you can see individual brushstrokes (mostly 3-6" house painting brushes, I think). The subtlety and detail of each stroke is extraordinary. There are patterns across the canvas that are a result of large-scale patterns of strokes - it's almost like cursive handwriting.
You may be interested in this video by the Getty Conservation Institute on the conservation of Mural:
But, in a gallery, people encounter the Rothko and just stop. Many of them will stare at those large splotches of color for 1, 2, 5, even 10 minutes. Turns out there's a whole lot going on there that just doesn't translate into print.
Sadly, a lot of the techniques that abstract expressionists used don't translate well into the future, either. Layering just oil paint, that's pretty durable. Layering different kinds of paint, not so much. I've seen a fly dislodge a flake of paint from one of Rothko's paintings just by landing on it.
PS: I just shamelessly throw in another excellent BBC documentary series here: How Buildings Learn, by Stewart Brand [0]. I sometimes see it mentioned here on HN, but it cannot be mentioned too often. If you haven't seen it, please please do.