I don't see the point of them having all of the buttons double (or even tripple) as other things. Why can't they just have four hardware buttons (or 3 at least)?
I can understand the home button doubling as recent apps like the S3, but having it do three different things while the back button does something else too (with a setting that most users probably won't find or understand) doesn't make sense to me.
I know most members here won't care, but that just seems slightly confusing for the general public and most consumers. With their company not doing so well lately, the business student and techy in me just can't wrap my head around it.
I hate to say it, but the possibility of a ton of apps having a good bit of the screen covered by a black menu bar is just something I could never see as being a possibility in iOS or any Apple product.