Depends on what the haptic touchscreen keyboard will be. Will it be comfortable to type on? Will it drain the battery? Will it have similar Bridge OS issues?
My priorities are:
1) Reliability
2) Usability
3) Ease of repairs/getting replacement units
4) Design
The current touchbar/keyboard combo fails 1), mostly fails 2), totally fails 3) and does good on 4).
I don't think it should cost the same (realistically it should be $100-$200 cheaper), but I would definitely consider getting one far more than the current ones
I believe the keyboard was updated on the new models with something to keep crap from falling into it. iFixit did find if you dump powder/sand on it and very aggressive type you can get it to fail. Probably should avoid the keyboard if that is situation you are worried about. Time will tell though for your #1 though.
The rest are a bit subjective IMO.
I'm used to using desktop keyboards generally with Cherry key switches or even keyboards like the IBM model m which I still use to this day (aka a lot of key travel and clicks with a snap).
However I love love love the 2018 MBP keyboard and I never thought in a million years I would ever say that. Within 2 minutes of using it I was thinking "ok its not miserable", within 30 minutes my wpm was very close to my desktop, and in about 2 days I was just loving it. I never thought I would be able to type on such a shallow keyboard with as much confidence as I do.
I can't explain to you why but the way I can slide my fingers around with less effort and less fatigue replaces the tactile feel I like with real keyboards. Like I said, subjective, I wouldn't argue its better its just different and its different in a good way for me.
The strong base and solid support with no flex of the MBP keyboard makes a big difference too compared to other laptops. The older ThinkPads for example, for me the key press feels pretty good however I can't type nearly as fast due to ergonomics, design and build.
I should mention I have a lot of practice typing on the iMacs wireless keyboard too so I'm sure that helped my transition to the MBP.