Everything that brings real innovation to the table has a chance. However, that alone is not enough, since some of these cryptos are in direct competition with Bitcoin, and some of these innovations can be implemented, at some point, in a Bitcoin sidechain.
Maybe coins with a very different structure, like DAG coins, might survive, since they're not competing with Bitcoin in mining. That said, I have high hopes for Bytes and Blackbytes.
Agree. Many of the features provided by altcoins such as ZK-SNARKS can become implemented into a Bitcoin sidechain. This will allow Bitcoin to become used for nearly anything that you would imagine such as smart contracts, micropayments, privacy, and more. If sidechains in Bitcoin become successful, then I believe that there would be no use for altcoins since the pioneer cryptocurrency would become an All-in-one blockchain platform.
However, even if this is possible, perhaps not all the altcoin's features would become implemented into Bitcoin. There are many advanced cryptocurrencies out there which provide faster transactions, greater privacy, and cheaper fees. The ones that use tangle technology such as IOTA, and those who use DAG structure like ByteBall are extremely efficient in processing transactions at a fast pace. IOTA brings a no fee structure, making it extremely ideal for IoT use. There is also DASH which brings masternodes allowing for greater privacy over user's transactions.
Therefore, if I were to say which altcoin or altcoins would survive in the future, those would be such that could provide constant development, innovation, and acceptance in the mainstream world. In crypto land, altcoins come and go, but those that have taken the effort to go to the next level, will continue to make strides in the market. Just my opinion
