On a P&S camera, I'm perfectly happy to take a throwaway GPS (although the unknown GPS chip in the AW110 seems an improvement on the earlier Nikon GPSs, inasmuch as it provides bearing as well as lat, long & altitude, although it seemingly loses signal under water) but for use with a better body, I'll chose my own GPS, thank-you. I was delighted that there was no GPS in my D3s, and I sincerely hope that the D5 won't have one either (I'm skipping the D4). A bit odd that the Wifi and associated "app" won't let me transfer wirelessly to a Windows Laptop!
Yes, Sony don't (you say) give the Camera Serial in the Exif, and, I fear Canon didn't provide that service in my G11, nor, indeed, in the G12 I bought to replace it. Pity, and, not, I fancy, really very expensive to have done. Even the Canon DSLR require external software to insert the Artist and Copyright, unlike Nikon.