XUI, or experience-user-interface, is Microsoft's anticipated evolution of the NUI, or natural user interface (a la Surface). What's that really mean? It means something amazing—essentially computers/life rethought.
Keep in mind, these two concept videos are not necessarily grounded in actual technologies that we have today, but were produced to "explore in a poetic narrative way how certain developing technologies could begin to blend and augment our daily lives".
The first clip is my personal favorite, as I love the idea of ordering a piano on my computer and watching it drop from my ceiling. But the second clip chooses a bit too much style over function for my taste. Do I really want information I'm looking for spilled across my desk like a spilled deck of cards?
*Keep in mind that both clips are available in YouTube HD, so you might not want to watch the embeds as they are. [i started something via SlashGear]