More like can you imagine if Apple had released a smartphone without MMS or even the ability to run third party apps?
Oh wait. That turned out okay after all.
That's just bringing out the old talking points against the original iPhone even though it's completely irrelevant in this context.
The original iPhone lacked a ton of things but it was the only usable multitouch-based internet device with then incomparable ease of use and ability to surf the web, as well as by 2007 standard, an amazing Google maps client, etc. It was lacking in features but the first iPhone was unique and its strengths were so good that many overlooked its short comings since there was nothing else quite like it. Unless you're the type of anti-Apple person who would claim the LG Prada was there even though you've never seen the LG Prada in your life let alone touched one.
On the other hand, the RIM PlayBook doesn't offer anything particularly unique and it's pretty clear they've ripped off the many of the existing UIs, most notably webOS. Moreover it is supposed to be a "professional device." Now we can agree that term is meaningless. But according to RIM, working professionals, those who use BlackBerry, are the types who do email and manage schedules on the go, which are exactly what PlayBook lacks. Plus given the PlayBook is a 7" device which is supposed to be portable, why the heck would one want to juggle two devices just to access the emails? Isn't the whole point of having a 7" tablet so that you have a portable device?
I can see the argument of RIM trying to go after existing BlackBerry users first but IMHO the typical corporate BlackBerry users are the last ones you want to go after unless you can get some enterprise sales. The first early adopters of this device will likely to be the hip young professionals who already own Android and iOS devices who are interested in having a powerful 7" device. We already have a ton of iPad users who use Android phones (I'm one of them), so it's pretty natural to expect that kind of adoption, especially from Android users who are likely to be interested in PlayBook's stellar specs and the promise of the eventual Android app compatibility.
Frankly I'm amazed that someone is willing to defend RIM's decision to release this thing without email and calendar. It goes against everything the PlayBook form factor is made for. That comparison to the iPhone's lack of MMS is just inane. However I've come to expect some posters in MacRumors to defend anything done by Apple competitors.