I don't need really high input bandwidth but I do need a large and high pixel display, hence the interest in using my own 'computer' for the user interface and display. And more than two analog input channels.
When I looked at the Oscium it turned out it had no capture depth, ie it captured exactly one screenful, with no zooming possible. Not sure if that was just early software, but my dreams of pinch-zooming on a deep buffer died