Seven more games are yet to be revealed, but on first glance at the ones revealed it's tough to see how Nintendo Land could hope to achieve the same effect as Wii Sports. While it might communicate the point of Wii U to some degree, it doesn't hold the same instant appeal as motion controlled bowling, tennis or boxing in your living room.
Part of the problem was displayed obviously in the press conference. It took Katsuya Eguchi a solid few minutes to explain Luigi's Ghost Mansion, a game that is supposed to be as easy to pick up as any of the Wii Sports, a game that is part of a package intended to explain Wii U. It looks decent, but it's not streamlined enough to be what Nintendo intends. Wii Sports worked not only because it was a game that immediately showed what Wii was all about; it was also because it required no explanation. Pick up Wii Remote, take a swing, understand instantly. The necessary immediacy is not present in what we have seen of Nintendo Land so far.
Then there's the split between single and multiplayer games. It's something for everybody, the single player games presumably aimed towards the 'core' gamer and the multiplayer games shooting to capture that Wii Sports demographic. But this structure in itself could end up being confusing – some games use one control method, others a completely different one. Surely the effect would be better to keep a single control scheme and concept mapped across each, perhaps even releasing two entirely separate compilations? Keeping Nintendo Land all in one will provide value for money for sure, but splitting the focus between two ideas and set ups could cost it and prevent it from achieving its intended goal.