I own a perfectly fine Playstation, why did I have to buy a PS2 for the handful of games I wanted to play? I guarantee only a handful of games are going to use the camera, and they aren't going to be worth it. If they are worth so much to you that you HAVE to have them and would buy a detachable camera to play them, I doubt you'd be so against selling your current DS and paying the difference. In fact, you would probably end up paying the same price you would if Nintendo sold it separately. A regular DS plus the camera would almost DEFINITELY cost as much as the DSi. I'm not just making excuses for Nintendo, I don't consider the DSi or any of its games so far to be worth the purchase at all, but if you think the games are worth buying a separate, overly expensive camera for (thank god....I can play a WarioWare game that doesn't even function properly as shown in the video), then there's no reason to think Nintendo is ripping you off as-is. You'd be ripped off by buying the camera, you might as well just stop fussing about it and be ripped off the regular way like everyone else.
But the PS2 was at the time brand new software and hardware, not just slightly upgraded versions of what the PS1 has (lets not forget the years of research and development the PS2 had, and the hundreds of millions of dollars that cost). The DSi is basically a DS with slightly better hardware and a camera.
It'd be more accurate to compare a PS2 slim to an older PS2 (there is a very minor improvement to hardware).
Also, I fail to see how a DS + camera addon would cost as much as a new DSi. Unless I did not already own a DS, even then, I'd guess a DS and camera addon would still be cheaper than a new DSi.
I can buy a brand new DS Lite for £70. Lets assume that a camera addon would cost £40-50, that is still only £110-120, a new DSi costs £140-150.
If I want a DSi now, I have already paid £90 for my DS, and can trade it in and get half the price knocked off a DSi, so that is £90 for the original DS, and £70 for the DSi, a total of £160.
If I attempted to sell my DS on ebay, I'd get maybe £30-40 for it, which would result in me paying a total of (90-40)+140, or £190, which is even more.
No matter how you look at it, it is more expensive to buy a DSi that it would be to buy a DS and camera addon. You are crazy, or really bad at math if you cannot see this!
BUUUUTTTT... I also cannot realistically sell or trade in my current DS either. If I did, I would be left with 11 useless GBA games. And then have to splash out EVEN more cash to buy a GBA to play them. (Apparently, it will be possible to buy them with this DSWare or whatever it is called, but Nintendo can get fucked if they think I am going to buy a game I already fucking own)
The point is. IF in the future a game that is DSi only (for whatever reason) is released and I want it, I am forced to spend a lot of money on a console that I basically already own. And I cannot spend or trade in my old DS because then I cannot play some games and have to spend even more money so I can play those too.
People in my situation are fucked either way basically. Because to get the best of both the DS and DSi I have to spend a whole ton of money, which wouldn't and shouldn't be necessary if they simply made a camera addon.
Nintendo are good at one thing, forcing people to buy stuff they already own!