It will most certainly be the iPhone 5 _If_ Apple incorporates the A5 CPU.
However now that Apples fallen so far behind their typical product cycle time line it's a real crap shoot, as to what they'll do. Making matters worse is the possibility of serious push back from those Apple enthusiast with the courage and free thinking to speak out against the debacle we witnessed today.
Offset by throngs of Apple apologists, who are now working overtime to justify the meager results of todays snooze fest, Apple may break from the past practice of sequential model names.
Given the fact there's been a widely reported A6 chip in the works for what was to be iPhone 6 before the recent developments, perhaps Apple with attempt to diffuse the weak showing today by rushing the next major upgrade to market.
The risk of a move like that is Apples declining, precarious and somewhat sketchy quality control. The first instance of Antennagate was bad enough. Now with the announcement of an even more complex and convoluted dual dynamic antenna system, it will be surprising if Apple succeeds in improving phone call performance.
One things for sure, Apple has further fueled their reputation as a highly polarizing company. This is one movie that will prove very captivating.