Well, it has been a while since the V-piano came out.
Pianoteq has been through a few updates, laptops have become faster and cheaper, etc.
I see somewhat separate markets, but from MY point of view (how I spend my money, etc.)
a) I don't want or need MORE hardware, e.g. a_NOTHER keyboard.
b) I will continue to buy faster laptops with more power (faster and/or more cores) every few years, for other reasons.
c) I do NOT want to lock several thousand dollars into a dedicated instrument that is competitive with "soft" instruments today and for only the next few months but will rapidly become "quaint" over time.
I would rather spend less NOW and (optionally) buy extensions or enhancements over time.
I don't see the GP computer burdened by the "other processes", they can be shutdown easily enough, e.g. network listening, background virus protection, indexing, background de-frag, etc. Most of these don't need to be run if there isn't (new)file writes to the hard disk.
As to whether or not there will be competitive modeling on laptops ?
I think there might be a "killer synth" in the works somewhere that will at some point swamp pianoteq's niche.
A general purpose synth, not tied to "struck string instruments".