Let me tug on that string a little: what (new?) features do we actually need or want? (I’m honestly asking.)
Apart from better maps and more data fields/a larger screen, my Bolt v1 does everything I want. A touch screen might make some things easier and I’d also like colored backgrounds that indicate power or heart rate zones (that’s one feature of my Wahoo Rival that I really like). But that’s not something, which requires new technology or a faster processor. A bell (which seems a standard new feature for all new head units) is great, too, but no rocket science.