Annuities were not a gamble, that was the whole point. In exchange for your savings built up in a pension plan you got a guaranteed income that would last you the rest of your life. It's the life bit that was the gamble… you can't rely on living long enough for that to be better than other investments (or even drawing down the pension pot). Now, at least, you have the choice. Hopefully insurance companies will improve their rates now they're competing with other forms of saving and investment rather than living in a walled garden where annuities were mandatory.
The downside of the policy, of course, is that it'll push up house prices. Wealthy retirees will take a good chunk of their pension pot and invest in property, the rental income should provide a much better return that they'd get from an annuity.