No, see, stop that right now. There was way more to this press conference than just the DSi. Look at all the games coming out for DS and Wii this year and next. Especially with stuff like Final Fantasy Crystal Chronicles: Echoes of Time, where DS players can play online with Wii players. If you've played Ring of Fates for DS, you'll know that EoT is going to be fantastic.
Phantasy Star Zero = PSO for DS, online Co-Op! Sin and Punishment 2 for Wii, Punch-Out for Wii? Arc Rise Fantasia? Takt of Magic? RYGAR?! There's lots of games in the pipeline for the hardcore.
This is hardly a confirmation of what people were feeling after E3. I'd go as far as saying it refutes that sentiment.