I think there is still a lot of room to grow in the USA. Nintendo has not aggressively marketed the DS as heavily as Europe. If they do, the DS could take off like it did in the UK, except on a much larger scale.

GBA owners loved games, and the PSP is barely selling software.  So this doesn't make any sense.

I think the DS will overcome the GBA in America because so far we've only seen its sales get stronger and stronger.  This is a guess, of course, because we don't know Nintendo's strategy, but the DS could clearly drop in price when sales slow.  Consider that Nintendo is sitting pretty with high profits on hardware, sales that are out of control, and stronger third party support every quarter.

This suggests the future is very, very bright for the DS.  There will probably be another DS redesign before it is all over with, the final price will be below $100 (probably significantly below), and Nintendo will continue to sell these things like hotcakes for at *least* another 4 years. 

20 million to go is a lot, but can be achieved. i doubt within 2 years though....

hard to say, but IF Nintendo can keep it out for another 2 years without an succesor. It all depends on how much the will sell during the holiday seasons and if they can keep the demand high during the slow months. A price drop to 99 USD can help a lot.

Maybe Nintendo is (gasp!) expanding on that GBA audience!

I'm sure Nintendo are flattered that you think GBA sold to every single potential customer, though.

Nintendo has said that they want to start lenghtening the lifespan of their gaming systems- I believe that handhelds are a a point where graphics really don't need to be better. Look at the PSP it has PS2 esque graphics and most of its games sell like crap. There is not point to having amazing graphics on a 4-5 inch screen, you would not be able to see it. What I do believe will happen is we will see the DS with a GB esque lifespan (GB, GBL, GBC) we will see a least one more significant improvement to the DS probably in about 3 years. Battery life will be increased, better screen, new features, not a new system... Nintendo realizes it is not good for them to have to restart their userbase every 4-6 years, With the Wii and DS they want to have 7+ years before they realese a new system. Now we have to wait and see if the gaming populace can get used to the fact that gaming machine will have longer life cycles.

Seriosly, have you looked at GT5's pics, what is the point of making a game look better than that- There needs to be a difference between gaming and reality, or esle there is no escape-

i dont think it will. i do think that the 360 will outsell ps2 sales in america. 360 is extremely popular in america. it sounds abit ambitious but i think its achieveable.

so psp is taking buyers away from extensive GBA userbase but all 120 million ps2 users are still waiting to upgrade to ps3?

Right.... 

You think the 360 is going to outsell the PS2 lifetime sales in America?  That's just crazy talk!