As far as we know right now, Intel's discrete graphics will be chips (not cards) installed together with the CPUs on a single package. It's also not clear whether Xe will replace, or co-exist alongside with Iris integrated graphics. In either case, it's interesting to see Intel graphics in the form of a standalone PCIe card, even one that will never be sold to consumers.
Intel also confirmed that the Xe would be available in three tiers: Xe-LP, Xe-HP and Xe-HPC. That alphabet soup stands for low power (aimed at gaming machines), high performance (for content creation) and high performance computing for data centers and supercomputing.
Intel still isn't releasing any number, but confirmed that Xe will arrive with Tiger Lake 10-nanometer CPUs later this year and double graphics performance over the current Ice Lake generation. It also promised "double digit" CPU performance increases with Tiger Lake, and "massive" AI improvements. Apart from that, it again revealed no additional performance data.
As we've already noted in our AMD vs. Intel CES 2020 explainer, AMD has unveiled very specific products and plans, while Intel has just announced upcoming products and been very vague at that. This latest announcement doesn't change that much, but at least we know that Xe discrete graphics chips are in developers hands, so the apps should be ready when it finally comes along.