I can have 10 different hwws, for different purposes in different locations and they still look obvious. It may partially solve the problem of occasional travel (not if you travel a lot and need constant access to your funds, though) but then you still need to worry about those hwws in those places. Distinct-looking, crypto-screaming hww does not have any value added over an inconspicuous design, it's actually the other way around, this is as simple as that. No matter what rules for travel with Bitcoin you develop there will always be people who have to do it and do it in a way that break those rules. That does not matter if they have valid reasons or are just careless. It's like people using the same password twice. You can blame them for getting robbed online because they used the same password on your website and in their online banking or you can simply add password salting and peppering on your website so when you suffer a leak those people with reused passwords stay a chance against the bad guys. Same here, manufacturers can keep making flashy wallets and then blame users why they keep them on display, or they simply can do anything in their power to design devices that don't attract unwanted attention. Also, as I said earlier, if a hww is something you should generally keep hidden then manufacturers actually do not have any incentive to design them with distinct look and very visible branding.