The bigger screen sounds enticing...but really, I could live without DSWare.
I don't know why Nintendo is making such a move though with DSWare only being in the DSi. I mean, the DS is already the highest selling current-gen system (more copies than even the Wii). With the already installed user-base, limiting DSware to this system alone is somewhat, well, limiting.
Ok, sure, it might run off of the new firmware, but it's not like Nintendo can't make a cartridge for $10 that lets you download DSWare to you older DS's.