A projection tool sounds nice.
You could insert a number for either monthly or weekly sales of a console, then have program automatically increase/decrease the sales by a percentage depending the season trends.
Of course it would be a really rough projection, but a neat little tool none-the-less.
A crude example whipped up in MS Paint:
(Sorry, but you'll have to zoom the image or right click and view it on its own)
Instead of having an "Initial sales number", you could have a drop down menu between the three consoles and use the current numbers for which ever one you chose.
Maybe you could go even further, and have these options for all three consoles on the same page, and put them on a projected chart like the one above... but with coloured lines.
By life end:
- Wii- 100 million+
- Xbox360- 35~40 million
- PS3- 30 million
- PSP- 30~32 million ------------- FAILURE
- NDS- 85~90 million (Skeptical) - FAILURE
- NDS- 100 million+ (Optimistic) -- Success!
