The only way around this at the moment is fully adaptive Led systems that use camera based light detectors to actually aim the light beams around oncoming vehicles ( you can get these on high end Audis, BMWs and also next years Mondeo too among others) when you see it operating its very cool and works well but it's currently expensive and not everyone can afford an Audi A8.
Xenon systems as a rule need auto light levelling and additional beam control to prevent excess glare to oncoming vehicles, this is only a legal requirement on 35w systems, lower power Xenon systems don't require this though. A lot of issues of glare actually come from poorly set up halogen based lights and/or people using high power blue/white bulbs in normal lamps, also glare can be a subjective issue, it depends on the driver, the road, the weather, the state of the windscreen etc.
People think Halogen lamps are better because they are cheap but the bulb performance degrades over a worryingly short amount if time (long before the bulbs actually fail) whereas Xenon is far more robust, lasts longer and uses less power so less CO2 emissions but its a lot more expensive. Most new cars should be using LED headlights within the next ten years or so though as the car world catches up with what cyclists have known for years.
Some companies are working on GPS based light aiming so the cars lights actually aim into corners and down into dips on the road but at the moment such systems are illegal to sell or use on public roads.
Yes, I design car lights as part of my job.
Oddly enough I was talking to someone from the UN ECE Global light legislation ( automotive lights are done under a UN legal framework) earlier this year about very high power ( read 1500 lumens and higher) bike lights....these are starting to be recognised as a potential road safety issue as the lights beams have none of the beam control a car light has to have. Legislation may follow...
...hang on, it's Friday night....must....not....think....work....must....drink....wine