I totally echo this statement. While the running shoes are faster then walking, the bike is faster then the shoes.I'm glad the Bike is still in the game. I use it when I'm breeding, when I'm gathering wings/obtaining HP EVs on the bridges, and just when I need to get around faster. It's very useful.
Also, I'm not too fond of holding down a button for extended periods of time just so I can move faster, and it doesn't seem good for the button itself.
The bike is not really pointless (like what the others said). It helps me hatch eggs faster (whenever I'm impatient) and I don't have to press B for how long to make myself faster, but in HG/SS, well the bike is not completely useless, it's just I don't use it often.
Plus, the music rocks. The G/S bike music is the only bike music I can remember.I love the bike! I rode it even in HGSS when I didn't have to hold down B to run lol