Just no!!! 

The Wii and DS sold as high as they did due to mainstream success. The people who purchased them were also less "casual" than PSP owners. PSP owners only bought 3.7 games per console, while DS owners bought 4.9 games per console, and Wii owners bought 9.3 games games per console... Which is also about 10% away from PS2 and PS3's 10.5 games per console, and the Wii is actually higher than the PSX's 9.2 games per console.

So no matter how casual you think DS and Wii owners were, they played way more games than PSP owners, and the Wii is only slightly fewer than PS2 and PS3 owners and a touch more than PSX owners, even though all three of those PS consoles were on the market quite a bit longer than the Wii.

I think it depends on how long Nintendo is willing to keep the 3ds alive, I can see that system selling above 80 million.

Comparing handheld software sales to console software sales has never made sense and will continue to never make sense, because it is common for families to have multiple handhelds but share games between siblings, whereas it is far less common for the same to occur with consoles. Case in point, all conquering DS has sold less software than any of the three consoles last gen despite selling over 50% more than Wii. 

How can the 3DS beat it while Nintendo has already launched their new portable console? (New 3DS)

(new format of games for a new console that is backwards compatibile, like my 60GB PS3, that didn't count in PS2 sales, right?)

i had a PSP, it was okay but nothing special

Handheld platforms sell less software than core consoles, but I don't think solely for the reason you've given.

PSP didn't even sell half the software DS did. Maybe due to piracy being so rampant on PSP and lack of interest from consumers in the PSP library.

At the rate 3DS is going it may sell more software than PSP as well. Regardless if it achieves 80 million units sold.

The ratio of wii and ds was inflated by casuals games every wii was bundled with Wii Sports alone sold 82 millions ,Wii u and 3ds will never had a games that sold even 1/4 of this.

If you look at best selling games on wii and ds most of them are casuals games if you look at psp best selling games they are most of them hardcore games

If

Not a difficult prediction to make. No one's actually expecting the Xbone to reach Xbox 360 sales, 360 is the best supported MS platform ever and it barely made it past the PSP. Xbox is losing the market share it captured from PS last gen. Nintendos hardware business is dwindling, the 3DS has peaked, mobiles changed the handheld industry forever, the next Nintendo handheld will likely have trouble reaching even the 3DS sales. Same story with their home consoles. Nintendo consoles sold less each gen since the NES if the Wii is left out.

NES: ~61M
SNES: ~49M
N64: ~34M
GCN: ~22M
WiiU: ~16M?

I see your point but still disagree greatly, they are not pushing the NEW format of games, ok, but still there is a new format of games (only one for now) that is for a CONSOLE that is not a 3DS (how do you call that?) They plan on selling for backwards compatibility, ok. the analogy you make with 3DS playing DS games is completely different in numbers from mine, ONLY THE very FIRST model of PS3 played PS2 games, that is a single model (of a total of maybe 20?) that can be counted as a PS2 because there is phisically both PS2 CPU and GPU inside (exactly the same chips).

If a new console doesn't exist then no one needs to buy a new one to play Xenoblade remake right? (joking) The box of the game doesn't lie, it is for a NEW console. (I count 2DS as a 3DS if you are wondering if I am biased, I let the boxes decide if one is a new console or not) Sony for example when talking about ps1 titles in recent years always tells that they are "PS1-FORMAT" titles.