The only aviation feature I wish it had (which I suppose is reserved for the pricier Garmins), is that I came to like on the G1000, where a magenta line shows you where you will be in one minute, all things unchanged.
My Aera 500 has an optional extended track feature the length of which can be adjusted. On my unit it is a white extension line, not Magenta, which is reserved for the actual route being flown. As far as I know that is a standard feature.