Prediction: RISC-V will at best take on in some niche markets. If RISC-V is lucky, it will maybe displace MIPS.
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Usual P.S.: The ISA has become less and less relevant to processor performance since the mid 90s (when Intel and AMD introduced micro-ops to the x86 world by dynamic translation) and is now less relevant than ever before. What is relevant is developer mindshare, good compilers, availability of optimized algorithms, and manufacturers pouring billions into creating better scheduling and execution for µops.
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Usual P.S.: The ISA has become less and less relevant to processor performance since the mid 90s (when Intel and AMD introduced micro-ops to the x86 world by dynamic translation) and is now less relevant than ever before. What is relevant is developer mindshare, good compilers, availability of optimized algorithms, and manufacturers pouring billions into creating better scheduling and execution for µops.