Here’s a list of the GPS receivers I currently have and use:

• Garmin Forerunner 205: Great running watch, with current readouts, plus I download info from runs into my Mac. Then I keep a history on my Mac and get full stats.
• In car navigation (x2 – my car and my wife’s both have it). This costs almost $2K per car, and, frankly, it’s not amazing. The screens are big, but I doubt I’d get it in my next car.
• Garmin Nuvi: Shared purchase, we trade it around for use on trips.

But I also have an iPhone, and I’m likely to get a new iPhone 2.0 like the rest of the six million users out there. So, since it’ll have real GPS, with Google Maps, no less (the best, to me), will I use these others? It seems that their functionality should all be easy to replicate on the iPhone, maybe with some App Store intervention.

The running functionality should be a snap. The only issue is the display – I can’t really wear the iPhone on my wrist to get current info. So maybe it’ll be good (I’ll check my situation less often) or maybe I’ll get an armstrap – this is all assuming someone writes a running app.

The car functionality should be easily replicable with the iPhone. It’ll probably even be better.

The Nuvi does have some unique features, like the ability to set points of interest for trips. But, again, I’m guessing someone (maybe Garmin?) will build that into an iPhone app.

My guess is, the rest of the GPS world just got dealt a sizable blow here.