I'm curious about what kind of security stuff IE12 supports. Does it support new curves like Curve25519? HSTS? In many cases, even if Chrome and Firefox are more pro-active about modern crypto, IE ends up holding them back for years. I wish that stop being the case with the new versions.

Also, unrelated to IE, but why doesn't Windows 10 add out of the box encryption like iOS8 and Android L? (one where Microsoft doesn't get to keep the keys in its cloud - I hope that's clear).