Web pages should be treated as “apps” by mobile phone (FirefoxOS thing)
Social networks should be federated, (I.e. Like email). Yes, spam will be a problem, so what? It’s a problem now.
Sites should use public key pinning, DNS sec and that DNS verifies object RFC
Linux (and all others) should have something like tripwire installed by default
Networking appliances should support SDN and have something like Snort installed by default
I should be able to fabricate an open source CPU and GPU if I chose to and had enough time/energy