Based on the latest Famitsu hardware numbers...
PSP comparisons: After 242 weeks, PSP is where PS2 was at 194.8 weeks (November 21, 2003), where DS was at 103.3 weeks (November 21, 2006), and where GBA was at 163.0 weeks (May 2, 2004).
X360 comparisons: After 190 weeks, X360 is where GCN was at 17.8 weeks (January 11, 2002), where PS3 was at 39.4 weeks (August 8, 2007), and where Wii was at 5.7 weeks (January 5, 2007).
PS3 comparisons: After 142 weeks, PS3 is where PS2 was at 47.5 weeks (January 24, 2001), where PSP was at 70.4 weeks (April 11, 2006), where GCN was at 131.6 weeks (March 18, 2004), and where Wii was at 36.4 weeks (August 8, 2007).
Wii comparisons: After 139 weeks, Wii is where GBA was at 99.8 weeks (February 15, 2003), where DS was at 77.5 weeks (May 25, 2006), where PS2 was at 118.7 weeks (June 7, 2002), and where PSP was at 169.2 weeks (March 4, 2008).
DSi comparisons: After 39 weeks, DSi is where GBASP was at 53.5 weeks (February 18, 2004) and where DSL was at 19.9 weeks (July 15, 2006).
Based on the latest Media Create hardware numbers...
DS vs PSP: Weekly shares of 72.2 / 27.8 bring total shares to 68.4 / 31.6. If DS stopped selling and PSP continued at this week's rate, it would catch up in 443.0 weeks (January 28, 2018).
X360 vs PS3: Weekly shares of 28.8 / 71.2 bring total shares to 24.8 / 75.2. If PS3 stopped selling and X360 continued at this week's rate, it would catch up in 614.3 weeks (May 12, 2021).
PS3 vs Wii: Weekly shares of 8.4 / 91.6 are the first time Wii has had over 90%. These bring total shares to 28.2 / 71.8. If Wii stopped selling and PS3 continued at this week's rate, it would catch up in 574.0 weeks (August 3, 2020).
Week over week, Wii explodes, DS continues sliding down, and everything else stays relatively unchanged.
Through the first thirty-one weeks of the year, overall sales are down. However, the systems can be split into camps of 3 up and 3 down. Here's how the year-to-date year-over-year percents stand as of now.
Home hardware: -36.9%
Portable hardware: -20.7%
Sum of all hardware: -27.3%
Though it's been near for the last eight months or so, this week finally pushes Wii 5 million over PS3.
Famitsu Software Stuff
In its third week Dragon Quest IX continues outpacing Dragon Quest VIII. Though not pictured here, it's worth noting that through week three Dragon Quest VII is slightly higher: 3.26 M to 3.22 M.