The hardware has the capability to be upgraded (via software) as long as the DSP chips have capacity. The current modeling is light years ahead of even the PODHD stuff, which was quite good in itself. I don't think the hardware is the limiting factor of development just yet. As far as things like touchscreens or physical knob interface, it shouldn't really effect base functionality.
At this point, beyond adding more amps, the only thing left is allowing custom models. I mean, being able to assemble your own amp, picking what tubes are in what spots (V1 is a 12AX7, V2 a 12AU7, etc...) EL84/6L6, how many, what wattage, output transformer type....etc. Also putting different speaker models in different cabinets, and also mic position between center and edge of speaker cone. These are the type of things that I can see being a welcome addition to the Helix. I don't see any of these features necessitating new hardware.
This all seems like a great big beta test of hardware in the last few years. You had HD500X with the improved POD HD modelling, and mulit (dual) paths, and there's the Firehawk FX(which also uses PODHD) with built-in Bluetooth, but single path. The Firehawk FX interface is eerily similar to the Helix, which is why it was such an easy jump for me (from FHFX to Helix LT). Maybe these technologies will all roll into a great package, hopefully for no more cost of current generation of hardware and the current hardware is discounted some.
I say this because the hardware development costs should have recovered, based on most business cases of 2-yr ROI. Why spend the money when you won't make any? Helix released in 2015. I would say they have made their money back plus some to be profitable (they don't do this for free). Helix LT is in a similar situation, released in 2017, with minimal costs as most of the internals are just a derivative of the original. The hardware development of the Bluetooth functionality was tested and proven with the Firehawk FX/Amplifi platform.
Thoughts, anyone?