A handheld can't replicate Wii Sports.
Can it iterface with a Wiimote?
Can it wirelessly or via an HDMI out send a video signal to the TV?
If the answers there are yes, sure you could play Wii Sports on it for when "grandpa comes over" or whatever.
Not that I think Wii Sports is really all that important any more anyway. Yesterday's news. As expected Wii Sports Club isn't doing much for the Wii U. Bowling and Tennis gets old after 6 years.
Can you play it on the go though? That would be a major problem for a hybrid. That kind of segmentation.
If only Nintendo had experience with wirelessly transmitting a video signal ... oh wait ...
I don't get it... how will they allow motion controls to be played on the go in a way that is pleasant to play?
Have you tried SS on the WiiU pad with the TV off? I have and it's extremely uncomfortable to play, though I like it I would never do it in a bus.