I doubt it. The jailbreak/decryption technique they used to get the IPA files was for iOS 5.1 on a 3GS. There are undoubtedly newer techniques, but actually maintaining and grabbing app files is non-trivial. And any centralized repository is instantly targeted, so you have a seedy app underground of stuff that probably isn't even current.

Then you have the fact that there is 40% overhead on Android to replicate the iOS experience. And the fact that the bluetooth and GPS components won't work.

So do you really think people will buy cheap tablets, spend time installing some hack to run older apps and then get subpar performance, just so they can have access to ios apps? Won't happen. A small sector of users might be willing to do this, but definitely not enough to disrupt anything.

I mean, this is considerably more complex than a hackintosh and we all saw how those projects just totally destroyed Apple's Mac sales. Oh, wait...