Yeah every one is right. They put the lines there for no reason at all.... FFS use your melon, of course they serve a purpose.... Steve will let you know what in June. I'm sure if they have some really good reason for them every one that was poo pooing them will all of a sudden love them.

...
Yeah, I don't get all the idiots that think this is not a production part (at this late stage) or are decrying it because of the "seams." Because of the stupidity of places like Gizmodo and now this quasi-legal repair site,
we don't even know that they are "seams." No one who has the access has bothered to even zoom in on them so we can see what they are.
Here are some good, possible explanations for those with no imagination or brains:
- If they are "seams" they would make the iPhone come apart in various handy ways. For instance the entire bottom piece (which contains the antennas), could be swappable.
- Since they aren't likely to be actual "seams" they could also fucntion to increase durability. The unibody construction will make the iPhone much more durable, but also rigid. That means if you dropped it, it would survive, but the glass front and back might tend to pop off because they are the only part of the design with mechanical "give." Ergo the "seams" provide just enough stress relief to stop this happening. This is a pretty standard engineering solution that's used all over.
- The "seams" occur at both sides of the bottom, and to the starboard of the headphone jack. These are the exact locations that accessory devices need to attach to the iPhone. The "seams" could easily function as grabbing points for said attachments given that the smooth hard aluminium surface would be hard to grab onto otherwise.
I personally favour them being there for a combination of point 2 and point 3. I'm sure there are lots of other possible reasonable explanations also.
Finally, to those that keep posting the alternative rendering of a "non-sandwich" iPhone ... please remember that design is not just about how something
looks, it's about how it works and how it's put together as well.
Apple has a patent on the metal ring that holds the glass on the front of the iPhone and it's a rather brilliant design from a functional point of view. The new iPhone takes that and runs with it.
This new iPhone will be a
godsend to places that attempt to repair iPhones. by undoing those two screws at the bottom and applying a suction cup to the glass on either side, the thing will pop open easily. It also looks like most of the parts are easily swappable and that they have moved away from the glue and tape.
This new design is ABSOLUTELY BRILLIANT and solves many design problems from the previous model. It's going to be the new gold standard whatever people think right now.
On top of that, ... if the glass cover is that new
ceramic which because of the patent only Apple is able to use in mobile devices, and the new body is
unibody which because of the patent only Apple is able to use in mobile devices, and if the glass is attached to the body on both sides by means of the
metal tension ring which because of the patent only Apple is able to use in mobile devices, then
no one will even be able to remotely copy this thing.
Nothing will come close to this in design chops for a long time and you armchair designers and engineers are about to be proved horribly wrong yet again.
This design is a slam dunk in the design world.