Yeah, 3DS has more memory than PSP. But remember that internet browser will have to run even in the "game suspended" mode, so most probably it will only use a tiny part of memory dedicated to 3DS' Home Menu. According to leaked screenshots from 3DS development unit, games use 96 MB out of 128 MB, which leaves 32 MB for Home Menu... PSP, starting from version 2000,
has twice as much.
Also, I understand the latest NetFront has lots of great features. But great features tend to raise the requirements and 3DS might not be powerful enough to fulfill them. E.g. check the trailer for
Tales of the Abyss 3D - no shadows, no antialiasing, low polygon counts - nothing that PSP couldn't do. And it's an upcoming game!
And by "Nintendo's attitude" I meant that they never cared about the added value or multimedia functionality. E.g. allowing only AAC playback on DSi was a total shame, even if this allowed them to cut their costs a bit. 3DS does not record video (users were looking forward to this feature a lot) while even cheap 50 USD mobile phones do that. Another example of their attitude - they kept the awful, noisy cameras from DSi...