What interests me the most is this screenshot of DDD, giving us some sort of idea of how Reality Shifts will work.

In the 3DS version, Reality Shifts would occur on the touch screen while time froze on the top screen. On the PS4, it looks like they'll just take up the whole screen. The Grid's Reality Shift in particular, pictured above, would require players to tap certain highlighted line of code as they appeared on the touch screen, though they'd disappear if you didn't tap them in time. On the PS4, it looks like it'll be sort of a quick-time event requiring you to push a specific button that appears alongside the highlighted line of code. This is speculation on my part, but maybe the button isn't always the triangle for every line.