However, even if they were to be ported, the functionality that existing Linux programs offer still won't be able to cover the uses that the casual or less technically-oriented consumer is accustomed to and is looking for. Furthermore, as I see it, the main issue with Maemo versus other platforms is that because the majority of the developer base works for their own enjoyment and reward, they usually only spend time on things they want to use themselves - these things are generally different than what the average consumer wants to use. (Case in point: portrait/auto-rotate mode war)

Now there's nothing wrong with that, because their efforts and time are still extremely appreciated, but it means that a lot of suggestions they see as pointless won't be worked on unless more commercial developers see a cash opportunity in it, which will turn off a lot of average users, which will repel commercial developers even more, cycle continues, blahblahblah. Maemo 5 isn't supposed to be 100% mainstream yet, but even in the next step, if the community temperament hasn't changed, I can't see Maemo 6 making that huge of a splash either.

(Did this ramble make sense? It's very early in the morning. xD)