Don't forget even the home use case where you're much less likely to have a pair of 30" monitors or even the space to put them... nor the IP concerns of the company, if you did have them in your living room. I agree, for apple this is most likely to be a creative/productivity play at high dollar. The challenge will be pricing and multi-hour usability (weight/watts/weariness).

You get retina resolution, high refresh rate, HDR, and 2Factor authentication (Biometric+Goggles)/information security in one package. Of course you'll still likely want to have a laptop to drive it (untethered) except for the simplest mobile games.