Bitcoin's LN is already progressing and should be capable of processing millions of transactions per second. We still have to see how it works in reality and what its throughput is really capable of, but I'm very excited and confident.
Man, every time I see people talk about lightning network it gives me goosebumps, especially so with how I have had a node operational and conducted quite a few transactions. It almost feels weird to not worry about confirmations anymore, because we're used to them and accepted that it could even take 30+ minutes for transactions to confirm. If there are mobile clients available utilizing lightning, people won't ever want to deal with the main chain itself due to the significant difference. In the end, people want near free and instant settling transactions, and lightning does exactly that, which will be a smash in the face of many altcoins trying to be the currency that Bitcoin couldn't be anymore....