The AR-LSTs weren't bipolar, though. They had front facing drivers that produced the stereo image augmented by the angled side panels and dome tweeters all around, giving them massive dispersion. They're especially well-suited to a wide room, such as an open concept home where you're moving around a lot, not sitting in the sweet spot all the time. That's how I use mine and they're brilliant for that application.
Modern bipolar surround speakers are built without a front facing driver and are designed to produce ambient sound rather than a focal point or stereo image. You're right, they don't make good front main/stereo speakers. They look similar to the old LST but they're not the same.
To the OP, dome tweeters still produce an excellent dispersion pattern and you'll probably find speakers that use them tend to produce a wide sound stage.