Sakura's love for Sasuke has been nothing more than a young fan-girl love for the cool and handsome guy. Sasuke has done nothing significant for Sakura apart from being around in the same group as far I can remember. After all these years that irrational crap-love is still arround & is even portrayed as "real".
What made me actiually slightly hate her was her fucked up confession to naruto to stop him from going after sasuke.
& indeed, appart from the Sasuke-tragedy and being a seccond-hand non-rep tsunade, she has no real influence in the actiual story what-so-ever.
The only plot where she could have any significance in the future is the up-comming naruto-sasuke fight/story