Sorry for the delay folks! This stays up for longer (till about midnight tomorrow IST).

Identify feature 1 that made an appearance in 2

Cracked by almost everyone!

Raghuvansh, Atul Mathew, Nakul, duriel, AmK, shenoyvarun86, Wasi Manazir, Higgers, foobar, madhur, Siddharth Jain, Dibyo, Jean Valjean, nishansolo, svgreatest, Rahul, quaziluffy, shrik, p vs np, Aparna, Johny Walker, jayanth, Arjun, Sombe, joe, Vijay and kiran