I thought about maybe if you had clothing that would restrict correspondingly with what you were seeing, if that would be good enough. Anyways, according to the study, you can already replicate that effect with nothing more than synchronized poking, and it's so realistic that it changes the way your brain perceives your body IRL.
So, I'm sure using the exact same testing conditions, but just with a more "specialized" character model, you could achieve feeling inflated through strategic poking today right here, right now. Hell, you could probably achieve the feeling of having boobs, or some more specific fetish like macro/micro if you wanted to. If you're into that sort of thing.
Here's an interesting thought, though - what if you had like a fully spherical blueberry-type character model, and you had the person stand spread-eagle and everything, just like the test conditions, and then, say, poke the flesh on the inflated character model's body just below the hand, which, if you mapped out which skin goes where, would be like the underside of your wrist/forearm, and poke that spot accordingly, or if you poked the flesh next to their feet (not that they'd be able to see it from a first-person view), and they were correspondingly poked on their thigh? Do you think the dissonance of what you're seeing and feeling would break the illusion, or do you think that the internal logic (relatively speaking) of the situation would enhance it?