Loves his sling...hates the pram! Any advice?

[Emma27]

My 2 month old bubby loves his baby bjorn sling. He could be carried around in it for hours! He loves facing outwards to see what is going on and it always lulls him into a blissful sleep. The only thing is he is starting to get heavy and I'm finding it exhausting going shopping with him in it. We have a Beema Q pram which has a bassinette attachment for newborns to lay down in. He is only happy in his pram if he is asleep or very dozy. Perhaps the problem is that because he is laying down he can't see what is going on so isn't as happy?
So am just wondering if anyone else has a baby who isn't content in their pram. Do you think the pram problem is likely to get better when he is a little older and can sit upright? When I see other babies in their prams they seem happy.
I'm hoping he enjoys the pram soon..the sling kind of makes shopping a tiring experience!!