Given the GPU is massively better than the integrated Intel ones, even under Rosetta anything that uses metal should be faster.
But GPU performance isn't related to ISA as you only need to make sure everything is compatible, i.e. no emulation so I'm sure that will be fine. That's why Apple showing Tomb Raider on Rosetta during WWDC wasn't exactly a tough task for their chips.
CPU performance is what's mostly affected by emulation.
It was more aimed at your last comment saying "Maybe once those results are out, the "Geekbench is bad" crew will turn into "Cinebench is bad" crew"
Which seems to insinuate certain things
It's a common occurrence that people tend to dismiss any benchmarks that show ARM closing the gap with x86, or in this case, completely bridge it, as "not relevant", "not real", "not good", or "not representative" and they're just running out of benchmarks where x86 has any meaningful lead. In most cases it stems from either not doing the actual research into how much ARM-based chips have improved, or in some cases x86 (or Intel/AMD/PCMR) fanboyism that wants to pretend like only Intel and AMD can make "real" CPUs.