So how does the sound of this compare to a bipole with the same two drivers? In theory I'd much prefer the bipole as closer to a single point source.
Again this design feature is nothing new. Paradigm, as just one popular example, has been doing it for decades. Never been a big fan (why use a driver for what it's not intended for)? Why not just add a sub (that can be adjusted)? The the title of this thread says it all (half way), why not go all the way (to a 2-way)? Or how about just going the route of the Bose 901 and use a whole bunch (9) of the same drivers? Or a line array (and give up vertical imaging entirely)? I see this as a slippery slope away from the single driver ideal.
With the crossover at 300 Hz you're not giving up much if anything wrt the "single driver ideal". Bipoles need space, and not everyone has enough space for a bipole speaker.
There are issues with interference running multiple drivers full range in a line array, Danny at GR has built a bunch of line arrays and has posted some good info about the issues...
With a 2-way the drivers have to integrate well, with this design the integration will be perfect because they are the same driver, and since it was designed as a full range driver this works, probably better than a lot of 2.5 ways.
As far as the "single driver ideal", they aren't imo. They are the best compromise for a lot of applications and for a lot of people's preferences... but for a lot of people a compromise by adding other drivers for subs for midbass reinforcement might be the best compromise. Why not offer a products that fit more people's ideals? It will only lead to more sales and more happy customers. Those that want a pure single driver can still go that route through one of the many speakers Omega currently offers.
That's my take anyway...