From what i know, it's nothign to do with Opera DS Browser because what they have done is that, they have somehow managed to use half of the Supercard RAM for homebrew in total technically speaking we would have around 20MB of RAM instead of 4MB which could come handy for homebrew i.e. EMU and other stuff.
The other half of the Supercard RAM will used to access the SD/MiniSD/MicroSD cards.
I am hoping for something good from this discovery.