Unless a benchmark is purposely modifying things to give a product (or company) an edge [which would take effort and be pointless for a Dolphin benchmark to do (I doubt any company is sponsoring Dolphin)], then no benchmark is really unfair. All it does is measure performance under certain conditions. If conditions change and performance levels change as a part of that then you could say a benchmark is out of date. The 5.0 stable is out of date compared to recent developer versions (every stable anything will be out of date as soon as the next dev version after is released). But if you run 5.0 stable for whatever reason (some people only want to run stable versions), then the data is accurate.
As far as other emulators goes
PCSX2 it performs about on par with Haswell, but no improvements have been made that specifically effect it either way. PCSX2 is really just single threaded performance dependent no matter the processor.
PPSSPP any x86 processor that is not either really old or a low power (think atom line) will do fine on most everything
Other newer system emulators start depending on a mix of CPU and GPU performance also they change so much week to week that there is really not a good answer.
As far as other emulators goes
PCSX2 it performs about on par with Haswell, but no improvements have been made that specifically effect it either way. PCSX2 is really just single threaded performance dependent no matter the processor.
PPSSPP any x86 processor that is not either really old or a low power (think atom line) will do fine on most everything
Other newer system emulators start depending on a mix of CPU and GPU performance also they change so much week to week that there is really not a good answer.