I know SSD's don't really do anything for most games. Just a few seconds off the loading times.
But for some games (mainly open world) it's ridiculous.
Check this out, skip to 0:35 for Battlefield 3, and laugh:
Also, Fallout 4 (9:20) is... insane.
Anyway I placed my order. So excited!
(But my wallet is not)
Should hopefully arrive next week, but due to holidays, might not arrive until the week after.