Aside from it's unique control scheme, one of the Wii's strongest features is its Virtual Console. Nintendo has compiled a list of classic games from systems like NES, SNES, Genesis, N64, Master System, and TurboGrafx-16 that are available for download. This has renewed interest in retro gaming and has brought downloadable emulator into the legitimate realm. Sony has been a bit behind on bringing this kind of content to their systems. Some PSOne games are available but they are few and far between. With the company's renewed interest in it's portable PSP, Sony is talking about bringing third party retro content to the system. Retro games are ideal on a portable system since you're unteathered to the TV and they tend to be shorter and easier to pick up and play than more modern titles. Nothing has been confirmed as of yet but the idea sounds promising. I would expect we'll see a lot of arcade ports and console titles from people like Sega. It's unfortunate we can't play classic Nintendo titles on our PSPs (legally). Maybe Nintendo still has a chance of getting me to buy a DSi.

Source: Pocket Gamer