The next big architecture

[PascalDragon]

I consider that the time of x86 is coming to the end. x86 not wining nor in speed, nor in energy efficiency.
And instruction set of x86 is kind of bloated.

What will be the next "big" architecture? Will it be ARM or RISC-V?

x86's big advantage is backwards-compatibility. (Just ask Intel.) The office and home user markets don't really need faster CPUs, AMD is even bringing old CPUs back. Improvements in price and thermals are of course welcome though. For users of mobile PCs, ARM seems promising due to it being more efficient.

Modern translation software can deal with running x86(_64) software without much problems. Just look at the work Valve put into FEX so that it can use it to run x86(_64) games on the Steam Frame which uses an ARM processor. And Windows' translation layer is also very usable to use x86(_64) software on their ARM laptops.

[Khrys]

x86's big advantage is backwards-compatibility. (Just ask Intel.)

Maybe the sinking of the Itanic could've been prevented had it arrived a decade (or two) later... offloading runtime work to the compiler is all the rage nowadays, compilers just weren't ready back then.

In any case, x86-64 isn't going away any time soon (too much market share/momentum + the US government's involvement in Intel, which isn't limited to the current administration).
ARM already dominates the smartphone market and continues to grow in other areas (Apple + lately Nvidia for desktops, STM32 in embedded).