The most recent rumors stem from discussion earlier this month on a site focused on Apple products. The site known as iMore credits "sources familiar with the plans" as saying an iPhone 5S will be released in August, while new versions of the iPad and iPad mini could be released as soon as next month (April).
Neither development would be surprising since they're roughly following Apple's historic timing of product releases.
Apple introduced the iPad mini last October, in an apparent reaction to competition from smaller tablet form factors, especially Samsung's smaller Galaxy Tab.
The iPhone 5 was released a month earlier, after the early summer cycle was interrupted in 2011 by the CDMA version of the iPhone 4 for Verizon Wireless (January) and later the iPhone 4S (October).
The iMore report predicts the external design of the 5S will be the same as the iPhone 5, but with a faster processor and better camera -- again, pretty safe bets since that was also the case with the iPhone 3GS and the iPhone 4S.
But these days, the pressure is on Apple to keep up the momentum and keep the iPhone on top of the smartphone heap, especially during the non-holiday sales periods. The first post-Steve Jobs iPhone fell short of some Wall Street estimates, yet is still a huge seller.
At the same time, the iPhone's biggest rival, Samsung's Galaxy S devices, are gaining momentum, with the fourth edition just recently launched. That's...