- Someone will get arrested with a 3D-printed gun.

- At least one profitable, company-launching app will come out on Firefox OS first. It likely won't be initially available in English.

- The "freedom and democracy are incompatible" thing will get at least one mention in the mainstream press that won't consist of outright mockery or dismissal.

- Police body cameras will become ubiquitous.

Edit:

- Apple will release the Swift compiler as open source software.

- Something someone at Y Combinator says will be presented as outrageous by the online media. The story will be prominent enough to briefly reach the top of HN's front page and will receive an official response.