I've worked for a few companies and startups trying this kind of thing. It's the wrong question.
The software side of a touchscreen is solved. You can run a number of operating systems and develop in whatever you want. Embedded Linux framebuffer, OpenGL, WinCE, Qt, WindRiver running a military GUI toolkit like VAPS, Ubuntu running GTK, hell - my Mazda's infotainment system is simply Opera running a bunch of Javascript code.
The problem is the hardware. There is no universal platform that can satisfy all of these ideas.
The cash register needs to be thin and stylish in a custom case. The menu board needs a weatherproof rugged box to hide behind a panel display. The in-flight system needs to be FAA-approved. The vending machine needs vandal-resistant glass that still works with a capsense system. The bulldozer needs industrial temperature ranges and IP67. Every customer is a special duck and it's going to be a custom build.
It's just one of those problems that looks easy on paper.
The software side of a touchscreen is solved. You can run a number of operating systems and develop in whatever you want. Embedded Linux framebuffer, OpenGL, WinCE, Qt, WindRiver running a military GUI toolkit like VAPS, Ubuntu running GTK, hell - my Mazda's infotainment system is simply Opera running a bunch of Javascript code.
The problem is the hardware. There is no universal platform that can satisfy all of these ideas.
The cash register needs to be thin and stylish in a custom case. The menu board needs a weatherproof rugged box to hide behind a panel display. The in-flight system needs to be FAA-approved. The vending machine needs vandal-resistant glass that still works with a capsense system. The bulldozer needs industrial temperature ranges and IP67. Every customer is a special duck and it's going to be a custom build.
It's just one of those problems that looks easy on paper.