Graphics.

Graphics plays a big part in technology, with good graphics it makes what you're watching much more interesting and clear to see.the way graphics changes is very clear,
in this photo the graphics on both the characters have changed and you can see the most recent one looks the best and this photo only shows up to 2008 meaning that even now in 2013 the graphics are even better.

Not many people always understand the effect of good graphics, it's only when they watch something with better graphics than they're use to they become more interested and realize the effect that graphics has on games, television program's, computers etc.
a good comparison to look at is the difference between vector and bitmap, this photo clearly shows the difference between the two.
The vector image is more
clear and appealing to look at
than the bitmap/raster image.