Just a thought, but if this thread is really meant to keep track of the numbers in terms of that 50% marketshare element, shouldn't it show numbers in terms of that 50% mark?
I'd recommend doing it this way (using made up numbers, due to laziness):
| Week | Wii | PS360 | Winner | Difference (Wii) | LTD Change (Wii) |
| 08/08/10 | 225,026 | 235,122 | PS360 | -1.1% | 0.01% |
The logic, here, is that the difference is represented as a percentage relative to 50% (so in the example, the Wii represents 48.9% of the marketshare for the week), and then also included is the impact on LTD marketshare percentage going to Wii. Since the Wii is a little under 48.9% of the marketshare at this time (currently 48.5%), getting 48.9% for the week means that the Wii gains slightly in percentage marketshare.
EDIT: Just so people understand, I chose to use Wii as the "positive" just because one had to be chosen, and "Wii" is shorter than "PS360", so the headings of the last two columns is shorter.
