Sony’s biggest question mark is currently its demo titles.  In brief:
Sports Games:
Sports Champions: The best of the bunch, but very uneven AI hurts solo play and it doesn’t have the same variety as Wii Sports Resort.
Tiger Woods 11: The control works well, if implemented a bit awkwardly (must used a regular controller to navigate menus prior to starting a game)

Gun Games:
The Shoot and Time Crisis: Razing Storm: Both good, but are arcade gun games that don’t make much use of the Move hardware other than as a light gun.

Party Games:
Start the Party: Simple fun, but only 1 player at a time?
TV Superstars:  Only “Get Physical” and “FrockStar” included in the demo.  “Get Physical” was fairly good, but limited, but I can’t see why anyone would like “FrockStar” which consists primarily of mimicking movements shown on the screen with the Move controller.  The remaining modes sound promising, but depending on when the demo was built there is a lot of work left to do.  Also, single player has no AI competition.

Puzzle Games:
EchoChrome II and Tumble: Tumble is arguably the best exhibit for the Move.  Both games are done well, but being puzzle games will probably limit their audience.

Other:
Kung Fu Rider: Disappointingly unresponsive control, seems to be lacking content as well.
Eye Pet: It may have been lighting related, but I experience difficulty in getting even some of the basic motions recognized.

There really doesn’t seem to be a “system” seller in the bunch.  It appears once again, Sony has provided some very capable hardware with no compelling title to go with it.

Nintendo showed off a few expected new titles based on its core franchise such as Legend of Zelda: Skyward Word, Metroid: Other M, Donkey Kong Country Returns, and Mario Sports Mix.   Also featured were reboots of some old classics such as NBA Jam, and Golden Eye 007.  While it was nice to see a fairly solid lineup for some classic IP, it would have been nice to see something new for the console market.  With motion control looking to be on track for both Microsoft and Sony and 3rd party support lacking, Nintendo will have to depend much more heavily on its 1st party titles to do well than in the past.  Most of the interesting information at E3 from Nintendo came from the official reveal of the Nintendo 3DS.  Once again it looks like Nintendo is going to show everyone else how a portable gaming system should be designed.    More information is available on the web and via the Nintendo Channel on the Wii.