Apple's yearly developer conference should see iOS 8, OS X 10.10, and likely some hardware.
Apple's Upcoming Hardware Refresh to Include Thunderbolt LED Display, Not MacBook [Updated x4]
But even that revised assertion isn't entirely correct, as while the Mac mini numbers are assumed to be correct, the part number ascribed to a new MacBook is in fact for a new Thunderbolt-enabled LED Cinema Display.
Apple has even confirmed that information by prematurely posting a new image on its site depicting the display and identifying it in the URL as the "MC914" part that had been previously thought to be a new MacBook. The display appears essentially identical to the existing LED Cinema Display from the front, although Apple's new promotional image displays a Lion desktop background rather than the Snow Leopard one found on the images for the current model. The rear of the display will obviously include a Thunderbolt port in place of the current mini DisplayPort connection.
Additional gallery images also show the new display paired with a number of Apple's Mac products, all of which show the same form factor as the current models, suggesting that the Mac mini scheduled to appear alongside the new display (which appears here as the Mac Mini Server model) will retain its current form factor. Apple's Mac Pro has been rumored to see a redesign, but appears set to debut a few weeks later than the new display, meaning that Apple would need to continue showing the new display alongside the current Mac Pro until that time. Consequently, the new image showing the Mac Pro likely offers no insight into whether or not the Mac Pro will be seeing a redesign.
Update: We've spotted a new image depicting a MacBook Pro connected to two LED Cinema Displays daisy-chained via Thunderbolt. This feature would only be compatible with 15-inch and 17-inch MacBook Pros of the current generation supporting Thunderbolt.
Update 2: While not revealing any new products, a number of images of Apple's existing products are also starting to be updated in Apple's online stores to show the Lion desktop background instead of the Snow Leopard one. For example, Apple's iMac page has had its graphics updated to show a Lion desktop, while other machines elsewhere in the store are still showing Snow Leopard.
Update 3: The 27" LED Cinema Display seems to have been removed from the Apple Online Store. Clicking "Buy Now" from the Apple Cinema Display page results in a broken link. Additionally, all the images shown above have been removed from Apple's website as well.
Update 4: The LED Cinema Display is back on the store.