I don't think you're "behind-the-times" at all, in fact you make a valid point. For me though, at 27 I'm not willing to tote around another device solely for gaming. I actually love that there's such popularity in mobile gaming now due in big part to the iPhone, the App Store, and the impressive hardware it boasts. .
To keep this from straying too far, a game like CM:DS I think would adapt fine to iPhone/iPod Touch. However, I can see where some may not feel the same way due to the unconventional controls (touchscreen). But, as far as capable graphics hardware, the iPhone is quite a little powerhouse and simply leagues ahead of the DS, and in some respects the PSP, especially the 3GS model.