Tigger: that Wii-thingy was supposed to be joke ... I'm not seruously expect port for it anyhow.

Bloodline: Console lifetime is of course depenmdent of company making them (M$ seems to have shortest lifetime-expectancy), but based of previous Sony history somehitng like seven to ten years could be my guess for PS3. Most likely 4-5 years as their top line model, then similar time as an low-end entry level product.
In comparision ... Remember it ain't long time ago when Sony still had PSX/PSOne on sale, reaching full 10 years of sales and well over 100 million sold worldwide. And PS2 is nowdays seven years old (had one major model upgrade/ cost cut) it still oversells many newer systems (PS3 and Xbox360) and it managed to overlive camecube and original Xbox, thus having a *HUGE* 115+ Million sold.
So.. *IF* this now launched PS3 reaches similar figures that eralier Sony consoles it'll likely to stay on production allmost a decade and to have 100Milion+ systems sold... And even if it happens to flop (relatively) and sell only 10 million it would still be quite acceptable target for OS porting.
And for 10 years from now? Who knows? Who cares? With the trend of last 10-15 years, is there anyone around with *any* interest to any Amiga related???