Random post number 2 for month 2. It would seem apparent that Sony hasn't really learned their lesson from the Vita's limiting features (though they're being revamped little by little with every other update), the PS4 has it's own, and in far greater numbers.
Sales of the unit started in Japan last February 22, and it hasn't been flying off the shelves as projected. That's mainly attributed to the fact that less and less people are getting into console gaming due to being more busy and on the go, but more than likely the decline in interest is probably due to these... not all of them are atrociously bad, but Sony kinda overdid it:
Pic source is from one of the peeps I follow at Twitter.
*Note: Most people know this already from the initial US release... so sue me, I don't look up stuff that's not from Japan, being an otaku and all...
*PS3, PS2, PS games cannot be used.
*Video Output is through HDMI only.
*DVD/BDs have to undergo online verification, otherwise playback will not commence. (For customers with no internet connection, call the Information Center hotline)
*Cannot play Music/Video CDs.
*Online Play (Vs, Co-op) requires PS Plus Membership.
*Torne (HDD Recorder program) cannot be used.
*Nasne (Network Recorder + Cloud Storage System) cannot be used, a system-compatible version will be released at a later date.
*Bluetooth device compatibility is limited.
*The USB Charging Cable used for Dual Shock 3 cannot be used on the Dual Shock 4 (DS4 uses a micro B cable)
Speaking for myself though, I'm willing to wait until a 2nd/3rd gen unit is released anyway. By that time a lot of those features will probably be amended.
If there are any good exclusives released midway, I might buy them standalone for now.