While this week (price-cut) and next week (SS and Tales) are obviously important, it's the week after that will help answer questions. I don't think the third week should be determined by 3DS vs. Vita, but I'll consider it a huge positive if Vita is above 30,000 that week. Sounds far-fetched but we'll see. 3DS will be fine even if it is number two for a week or two. It's April plus schedule (plus Animal Crossing now with Layton etc) all but guarantees it.Even if that's the case, does the Vita have anything in the future that will sustain the bump before it comes crashing back down to its previous levels?
EDIT: I think Professor Layton will keep the 3DS above the Vita in any case.