I would certainly hope that the F-22 offers capabilities over and above the F-16 and F-18, for all the money we spent. And the F-35 likewise should be "light years" beyond the Classic Hornet and any US-operated F-16.
But once again - it's not an iPhone until new mission functions (apps) can be integrated without spending months/years and millions on regression testing. This can be done and may one day be done on the F-35 but it is not present yet, as a quick and unbiased scan of the last several DOT&E reports will tell you.
By the way, the example of cross-platform fusion you describe was briefed by Ericsson (now Saab) in 2002 and some similar functions were available on the JA 37 Viggen. "Any radar, any shooter" was a standard feature of JAS 39A/B.