It's difficult to say for certain whether the Intel ARC GPU will be good for mining, as it hasn't been released yet and there aren't any benchmarks or real-world usage data available yet.
However, based on the specifications that have been released so far, it seems like the Intel ARC GPUs will have decent performance for gaming and graphics-intensive tasks, which may translate to good mining performance as well.
That being said, there are many factors that can affect mining performance, such as the specific mining algorithm being used, the software being used to mine, and the configuration of the system. It's also worth noting that mining profitability can fluctuate over time based on factors like the value of the cryptocurrency being mined, mining difficulty, and energy costs.
Ultimately, until the Intel ARC GPUs are released and more information is available, it's difficult to make a definitive statement about their mining performance.
