Expect no bloatware on the Surface. Microsoft knows better.
As for vital apps -- expect vast varieties, no doubt. I would hope to see a wide-range of productivity-styled applications designed to take serious and intuitive advantage of the Snap Screen-multitasking aspect of the OS. The already-announced Netflix app appears too simple for my tastes. I do like the edge-to-edge appearance over-all, but, like all previous Netflix apps, it seems to suffer from a lack of in-depth abilities, such as advanced search options, as well as video and audio playback nuances. Do expect the Store to grow considerably fast, as RT features a considerably diverse stage to build upon.