The reason they don't change their pictures is because companies like Maxell, TDK and Memorex don't change their part numbers for the discs when the speed changes. So if you're a company ordering TDK branded DVD-Rs in a 15pc spindle, you might start by receiving 2x media, but ordering 6 months later, the exact same item on paper, you might receive 4x media, and then another 6 months later, you might receive 8x or even 16x media in the spindle. But all your paperwork remains the same, and all the barcodes on the products are the same, and if you are a big-wig sitting in an office miles away from the retail outlet of warehouse, you have no idea anything has changed.
Punch Cards -> Paper Tape -> Tape Drive -> 8" Floppy Diskette -> 5 1/4" Floppy Diskette -> 3 1/2" "Flippy" Diskette -> CD-R -> DVD±R -> BD-R
The Progression of Computer Media