I strongly doubt if there is any other alt. that can surpass ethereum. They may all try to, just like XRP tried, but do not have what it takes to transcend ethereum. The most established altcoin i have ever seen or come across is eth. No mater how it falls, it will still continue to maintain its position. Some were afraid when eth was plummeting and they though the end has come again, but just barely few weeks, eth picked up again. I am just trying to imagine how glorious the future of eth would be.