Is it even possible to get an 8 GB regular hdd nowadays?
Maybe it's a typo, maybe it should say 8 TB?

(not quite serious)
Seriously, if they plan to compete in any way with Apple/Sony/MS with apps and DD purchases then they need to have more than 8 GB. I have 16 GB on my iPad2 and I'm constantly removing stuff to get enough space for new apps/games. Letting us use any external hdd we want is not the right way imo, then it'll be like the Vita situation where the console in reality is quite a bit more expensive than you think.