Based on the latest Famitsu hardware numbers...
PSP comparisons: After 234 weeks, PSP is where PS2 was at 187.9 weeks (October 5, 2003), where DS was at 101.6 weeks (November 9, 2006), and where GBA was at 158.3 weeks (March 30, 2004).
X360 comparisons: After 182 weeks, X360 is where GCN was at 16.9 weeks (January 6, 2002), where PS3 was at 37.9 weeks (July 28, 2007), and where Wii was at 5.5 weeks (January 3, 2007).
PS3 comparisons: After 134 weeks, PS3 is where PS2 was at 45.0 weeks (January 7, 2001), where PSP was at 68.2 weeks (March 27, 2006), where GCN was at 124.1 weeks (January 25, 2004), and where Wii was at 35.3 weeks (July 31, 2007).
Wii comparisons: After 131 weeks, Wii is where GBA was at 98.0 weeks (February 2, 2003), where DS was at 77.0 weeks (May 21, 2006), where PS2 was at 115.9 weeks (May 18, 2002), and where PSP was at 166.9 weeks (February 16, 2008).
DSi comparisons: After 31 weeks, DSi is where GBASP was at 46.2 weeks (December 29, 2003) and where DSL was at 16.1 weeks (June 19, 2006).
Based on the latest Media Create hardware numbers...
DS vs PSP: Weekly shares of 60.5 / 30.6 bring total shares to 68.3 / 31.7. If DS stopped selling and PSP continued at this week's rate, it would catch up in 490.8 weeks (November 3, 2018).
X360 vs PS3: Weekly shares of 39.4 / 60.6 bring total shares to 24.6 / 75.4. If PS3 stopped selling and X360 continued at this week's rate, it would catch up in 323.4 weeks (August 19, 2015).
PS3 vs Wii: Weekly shares of 37.2 / 62.8 bring total shares to 28.3 / 71.7. If Wii stopped selling and PS3 continued at this week's rate, it would catch up in 477.8 weeks (August 4, 2018).
Week over week, DS comes down from its bump and the rest are pretty flat.
Through the first twenty-three 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: -37.1%
Portable hardware: -24.4%
Sum of all hardware: -29.5%
Famitsu Software Stuff
Kingdom Hearts: 358/2 Days had a great first week. And actually, it had only half as many days of availability as most games have their first week. Few games have only two days to sell on their first week, and among those that are in my records only 3 of them did better than Kingdom Hearts. Those games in chronological order are Gran Turismo 3, Dragon Quest VIII, and Pokémon Platinum. Of course, it's perfectly possible that many games that sold large amounts in a normal four day period would have bigger two day periods if we actually had that data.
Bleach: Heat the Soul 6 (3521) once again ridiculously closely mirrors the sales pattern of Bleach: Heat the Soul 5 (2874).
Probably thanks to some price drop, New Play Control! Pikmin 2 has a big jump on the charts, from #53 the previous two weeks to #19 this week.
Famitsu Software Pie: Thanks to Kingdom Hearts, DS takes 64.6% of software sales this week. This is the biggest percentage DS has had since September 2008.