Who have you shown VR to was interested in it? My brother shows off his VR unit to everyone, but I've never seen anyone that tried VR that was interested in purchasing it. Even he doesn't use it anymore.
Using VR actually seems to cause less desire to buy it, including me. It actually turned out to be a worse experience than what I expected.
Better question is what is c0nfused showing that your brother isn't? The specific app between the two of them is important, but also everything else. From the headset hardware; at the extreme ends; Oculus vs Google Cardboard. Also important is what add-ons they both have - seeing your own hands inside the
headset is remarkably important for immersion, which is kind of the point. Also important is the level of preconfiguration - if the number of times the presenter says "wait hold on", and then goes to futz with the settings for 5 minutes isn't zero, then VR is a total turn off and, eugh, I don't want one. The cables going to the headset are critical as well - wireless isn't here for VR yet, but if there are multiple tangled cable messes rather than a single zip tied set of cables, I'm not going to want one in my living room if it's too complicated to put on and is just gonna be a mess in my living room.
It's entirely possible the two crowds being presented to differs by that much, but there are so many other variables in play too.
Using VR actually seems to cause less desire to buy it, including me. It actually turned out to be a worse experience than what I expected.