Yes, as far as still photos are concerned, this is exactly why I would find a wireless solution appealing. Indeed, that's what I've been playing with using Helicon Remote in a wired configuration.
And I wasn't kidding there's a similarity in all the different software apps that I've looked and . . . and now I think I know why.
In the very first comment on the article, RA states
Actually it's quite pricey because the hardware is a cheap $30 TP-Link router TL-MR11U, with a free custom OpenWrt firmware »wiki.openwrt.org/toh/tp... and opensource gphoto library for camera connection, so all what's left is a simple webpage hosted on the router for user interface. So If you have some development skills you can make one for yourself for a fraction of the price. In fact this is a good idea for an opensource project
Cheap router and the majority of the software functionality may well be based on open-source solutions. So, like R A says, it really may be nothing more than the user interface that largely differentiates the solutions from different vendors.
I think I'll just be patient until the competition starts putting out some $100 to $150 alternatives.