This week, Google announced that Chrome would begin to use it’s own rendering engine called Blink. The decision was taken after apparent disagreements with Apple over the direction of core elements of Webkit, and means Chrome will even more than before be different than Safari.
Chrome has always used it’s own forked version of Webkit which had slight differences, and contributed code back to Webkit as it was developed. However, with the change to it’s own engine this will now stop and the differences between Chrome and Safari will grow greater.
Google have a good record of keeping Chrome current and implementing new features that make life easier for developers and this should continue with features being added, and diversity can only be a good thing within the standards process.