You probably should care. It only takes 6 hours per day of usage for your 60W incandecent to suck up $13 of electricity in a year. And you'll have had to change it at least once. The LEDs will last for over a decade.
Yes, if you're only renting a house/apartment for a year then you may not recoup your costs (although it will be close). Similarly if the light is on for less than an hour per day. But if you plan on sticking around awhile it makes complete financial sense. You can literally save $200 per bulb over the lifetime of a bulb used heavily.
Also, the prices will continue to fall.
EDIT: mikeash is right that I should have mentioned the dependancy of efficiency savings on your local electricity prices. I used 10 cents per kilowatt hour, which is a bit under the national average of 12 cents (meaning I was being conservative in potential savings).
http://www.npr.org/blogs/money/2011/10/27/141766341/the-pric...