It is a bit of a fall, but I am not sure there has been a fall like there was with the Wii to the Wii U or PSP to PS Vita.
In terms of percentage, pretty sure those two are unparalleled. In terms of raw numbers, PS3 fell by 70 million from PS2, which is more than PSP to Vita.
Thinking about it, the DS to 3DS drop is probably the biggest when you look at the raw numbers.
VGChartz Sales Analyst and Writer - William D'Angelo - I stream on Twitch and have my own Youtube. Follow me on Twitter @TrunksWD.
Writer of the Gap Charts | Weekly Hardware Breakdown | Top 10 | Weekly Sales Analysis | Marketshare Features, as well as daily news on the Video Game Industry.