Re: I suspect
There are a number of issues with the judgment, many of which (as you correctly note) are hard (but not impossible) to challenge.
First, no-one should read much into Judge Koh's post-trial rulings on this matter; whatever she said, there was going to be an appeal, so why should she stick her neck out? She kicked the whole thing upstairs, and in the meantime prevented undue disruption (e.g. by banning sales of product).
But even if you choose to conclude that an appellate court is unlikely to overturn a jury's decision based on the jury's conduct (which is a reasonable conclusion), there is a large raft of problems awaiting Apple:
1. The amount of damages seems to have no bearing on anything much. While an appeal court may choose not to change a jury's verdict, they adjust the amounts of damages all the time (and almost always downwards).
2. Some of the features that Samsung is alleged to have infringed do not exist in the phone that the jury claims infringed. This is another downward adjustment!
3. At least one patent is provisionally invalidated (the bounce-back one), so if that prevails, Apple won't see a penny for that non-infringement.
And so on.
No reasonable observer would expect Apple to collect the $1B; the question is whether they collect a significantly reduced amount, or a retrial is ordered because it has become impossible to figure out precisely how much the jury awarded due to which patent on which phone, and why.
IF a retrial is ordered, I think it much less likely that Apple would prevail again.