My take:

ppi: the device looked mediocre aka not bad at all before. The web pages sucked most while the low resolution kept really nice games running cool. Now web pages look great while games can still provide tons of polys at 1/2 resolution while looking decent.
See open TTD at 1/2 resolution on N900 - it hurts the eye really! while on full res it's too small to play.
Although the ppi is OUTRAGEOUS the fact that it's been doubled has this obvious advantage.

camera: nothing apple said is to be believed. But the fact that it's a decent 5 mp camera like on our own N900, that I believe. It won't win any prizes but it gets it's job done. Even comared wit professional camera-phones like N82 (mechanical shutter might I add) the result is not bad.

battery: I was sure it wasn't going to be able to keep up. But, it's 1440 mAh so maybe cycling it (just using it, LiPo should never be over discharged) should bring up the real potential in a few days.

antenna: I'm shocked! they didn't lie. They were actually stupid enough to use it as an antenna. I guess I might not be getting it after all :|