Almost certainly. There may be small corner cases where the translated code is faster but I’m sure they’re the exception.

That said, people may not care. ARM can be very fast. My iPad is faster than many low end laptops.

So you get in the situation where a low cost laptop with ARM may be as fast or faster going through emulation than a low end Intel chip from 4-6 years ago while providing WAY more battery life.

People may be willing to make that trade.

I’m guessing it’s not 20% speed on most tasks. Probably 80%+, depending on the age and power of the Intel chip.

I think 20% is more likely than 80% for raw compute tasks - ARMs are competitive with intel in performance/watt, but are not much better at it (and definitely are not competitive yet in absolute performance). People are going to buy it for the 20-hour battery, and then run the CPU at 100% to run emulation which will eat the battery in 3 hours.

However, most people run a small selection of programs most of the time (web browser, word, excel, outlook), which will likely have an ARM native version sooner than later, and the long tail of programs they must have are often not compute intensive, and spend 85% of their time in the OS doing graphics/io which are native. So overall, even if the CPU emulation is 20% speed, the overall feel is likely going to be 80% or better for most people.

Gamers shouldn't hold their breath though.

Eventually you'll see most people just release ARM versions. Look at Apple/Rosetta.