Exactly. One of the main reasons keeping me from Windows Laptops is the trackpad. Even if Windows 10 was on par with OS X, OEM trackpads are still behind. The Surface Book is the closest anyone has come to matching Apple's trackpads, but still, there's a difference.
Still, will be interesting to see what Apple has in store for the rMBP, rMB and even possibly the MBA in the upcoming months.
Windows 10 on the RMB is an absolute pleasure, you should not view it as being 'not on par' with OSX. In many regards it's actually better.
BJ