The qubit is a dead end.

All future useful quantum computing shall involve holographic quantum memory. We will manipulate quantum memory and call that computing. By constructive and destructive interference this holographic sieve will solve all mundane hash collisions or brute force polymorphic solutions.

The real trick will be translating this medium back up to our interface technology (full loop). As we are legacy digital and quantum holography is analogue. Do you suppose we will bitmap quantum holographic renderings just the same?

The qubit is a dead end.