Yes, I think they need to say/show something more than "see you at E3 lol!", because if this was the plan all along it wouldn't made sense not to tell us directly last year, as usual when they are not going to say a word before E3.
I mean, this is the road we've been through:
-Iwata announces NX: "we won't announce anything until next year"
-Kimishima as new president: "we won't announce anything until next year"
-Now it's "next year": "oh sorry, we meant 'next fiscal year', wait a bit more"
-Starting new fiscal year: "hmmm... well, just wait until some meeting in a few weeks"
If the next step is:
-New FY briefing: "we'll talk about NX at E3/special event the last week of may, please understand"
Many people will be pissed, and rightfully. I mean, I'm not asking for a full blown unveiling with console, games, os, date and price, but I think we deserve more than a "announcement of an announcement". If they give us (investors and fans) the name, the basic philosophy behind the "brand new concept", or show us a prototype or a technical demo... anything, it'll be great. Nothing major, I understand they'll want to keep the biggest surprises close to their chests until the big event. Just anything more than a date to bear the pain the few weeks until the conference/direct.
I'd be ok with an announcement of an announcement if the Direct/Event is scheduled in the next seven days since the briefing tho...