I admire the optimism, but I don't know how an ordinary user will be expected to be in it long term, unless he/she is incentivized from the level of specialization in maintaining a Lightning node. But I see a debate for altruism to boot-strap the network.
For me, there are mainly two conditions for the Lightning Network to really take off:
1) Providers of massively used services must support it.
Yes, the exchanges. Onboarding exchanges must be one of the first priorities.
2) It must be clear that transaction costs using LN are much smaller than without it.
I believe it will be obviously clear.
Condition 1 is a chicken-and-egg problem. If there are many users, there will be many services, and vice versa. Ideally, some service providers could create something like a "beta area", where people can use LN to deposit and withdraw coins at their own risk but keeping the wallets of on-chain and LN activity strictly separated to minimize exposure to threats related to the alpha/beta state of LN software. But as it was discussed some pages ago this will probably only happen on a small scale.
Or Lightning Labs, Blockstream, or another VC-backed company that develops Lightning could hire a person specializing in business development.
So it is possible that a LN "takeoff" is more likely to come from a new increase of transaction fees due to fuller blocks (condition 2). This would make it again attractive for service providers to jump on the LN boat.
I believe not. It also needs a better UX, needs more exchanges/services providing liquidity for easy routing, and needs their users to become Lightning users.