Is it technically feadible? Sure. Is it likely given where BMW went with the S63Tu in the M5/M6? No, not in my opinion.
The advantage is sharper throttle response than a single throttle body. But Valvetronic essentially makes it a wash. I am not sure how the two compare in the areas of weight, cost, and reliability. I imagine there are trade-offs both ways. But since the N55 already has Valvetronic, that is the likely route. The only possible stumbling block would be making it work at nearly 8k RPM. But I think they will have figured that out.
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