iPad version is ok. Not sure that I want a PC version though. Although there are now way to many ports for mobile to PC as an easy money grab, this one is potentially a quality one. Still I don't see an attraction of owning for PC as well. By the way don't be confused with re-write vs port distinction. Every port is a re-write to certain extent. If they did not see business sense in doing it they would not invest the time (sorry, stating the obvious). Adding superficial "new features" is also a no brainer to entice the former iOS audience.
Disclaimer: having said the above I actually HAVE NOT played the pc version and HAVE NOT seen any gameplay trailers, including the one linked in the OP.