Japanese publication Famitsu recently presented the results of a survey it presented to 113 retailers, 47 developers and 370 gamers in order to gain their insight into the future of gaming." Here's where the DS fits in (emphasis added).

Number 1 gaming machine of 2006 according to developers
1) Nintendo DS - 49.9%
2) PS3 - 16.7%
3) Revolution - 10.0%
4) PSP - 5.0%
5) Xbox 360 - 1.7%

Number 1 gaming machine of 2006 according to retailers
1) Nintendo DS - 38.3%
2) PS3 - 31.5%
3) Revolution - 12.3%
4) (TIE) PSP/Xbox 360 - 1.7%

Overall Top Platform according to gamers
1) PS3 - 40.3%
2) DS - 32.6%
3) PS2 - 11.8%
4) Revolution - 11.5%
5) Xbox 360 - 2.5%
6) PSP - 0.3%