Getting rid of X86 won't happen. Just stop with this ARM pipedream. You're making a fool of yourself. RISC CPUs simply do NOT have the same processing power and capabilities that CISC CPU do.
There's a reason they call x86 a CISC and it's because it can do complex integer set computing. It can perform complex mathematical and algebraic equations and calculations to run programs and applications with extreme precision and efficiency.
RISC is called Reduced Instruction Set Computing for a reason. It's NOT meant to process high level mathematics or operate with efficiency. It's a low power part for basic instruction sets for small form factor devices.
RISC has been attempted many times and every time it has tried to even begin to replace x86, it's been a complete failure. The Snapdragon X still can not emulate x86 within 65% efficiency in CPU instructions per cycle. Even the Just-In-Time Recompilers used by LLVM/Clang can run RISC code at 75%+ efficiency, and RPCS3 is a living statement to that.
X86 can emulate ARM at 75%+ if you look at BlueStacks.
SPARC is dead, IA64 is dead, PowerPC is barely relevant, the Motorola 68K is dead. The Ricoh 65c816/6502 is dead. Every attempt has failed. Because it simply can not be done.