Other "advanced" alts has nice touches to them, but the most important aspect of any crypto is user support. There may be a few technically "superior" alts. If there are no one using accepting it as payment, it has no use in the crypto world. Currently, there is no other crypto which can sway the dominance of bitcoin.
Right, but that is not to say that some time down the road a few could find a mainstream spot also. BTC has had a head start, and has a lot of money backing it right now so of course it looks like king as it should be, but then again over time something might join it.