I’ve been wondering about UEFI 2.5’s HTTP Boot support since the Tianocore checkins started, a few months ago:
https://firmwaresecurity.com/tag/uefi-http-boot/
Intel announced more on this today, preparing for their upcoming IDF presentations on the topic:
https://twitter.com/Intel_UEFI/status/630806998951407616
https://twitter.com/Intel_UEFI/status/630807551664263168
UEFI 2.5 also added DNS support to complete the network stack needed for UEFI HTTP boot. I’ve yet to see any vendor except HP announce a product yet, perhaps IDF will unveil new products from other vendors.