Multiple IPs per NIC
This would enable use of hosting multiple VIPs or SSL sites on a server w/o the use of host headers. 3rd party load balancers such as F5 simply cannot match on-prem capability without this.
Amazon has supported this since 2012
This has been completed as of 03/22/2017. Azure service update here: https://azure.microsoft.com/en-us/updates/ga-multiple-ips-per-nic/
This is available now, though I don't think it's bullet proof yet.