I was helping Mom through Sam's (don't have a membership myself) and noticed a hybrid that had three grills, gas, charcoal, and this new stuff I don't even understand. Infrared or something like that. It seemed reasonably priced to me (seems like below, $260 or so). In a previous life I'd have loved it; in Hawaii or Florida when an entire outdoor kitchen would have been lovely and at that price would have been a bargain. Nowadays, I'm lucky to get my husband to grill out a couple times a month through good weather. I'm the one with a passion for food cooked over coals, he can take it or leave it. I say I'll cook it myself (I do 98% of the cooking, and certainly, especially in Hawaii, have cooked out many, many times and am a much more experienced camper than he). But if I do it myself, I think he feels guilty.
The only real advantage I can see to gas outside over electric or gas in your kitchen is getting the heat out, plus I do not have a vent in my kitchen (old house). But the other advantage, and I'm being sexist here, is some men won't cook in the kitchen, but will outside. So some women might go through any expense to get a little help out there!
I do so love food cooked over coal or wood, though, and would eat it most days given the choice. In Hawaii, when I was out of work and hubby worked 50+ work weeks, I often fired up either our little hibachi or our mini-weber and I miss that flavor.
I live in an area that can have pretty harsh winters, and we've already gone through a Weber and another brand, I can't imagine a gas or electric living through a winter here. I, too, am in the market, and barring anything else, am planning on getting another Weber (we've owned 4 or 5).