When I was in Hong Kong about 2 years ago, I walked all over town. This was a lot of fun and I saw some neat stuff. Eventually, I decided to take a cab. I was SHOCKED at how cheap it was (although I lived in NY shortly before this) and didn't walk more than a few blocks for the rest of the trip. If you can afford to get to Hong Kong, the cab fare shouldn't be a problem wherever you want to go.