how so? when top end ones have rear surround speakers so positional sound is perfect?
i own both and my 5.1 system isn't exactly bottom of the range either. i have proper monitor audio floor standers for my fronts. a bk xxls 400 for my sub and a top of the line yamaha when it was brand new when i bought it on launch.
i think there is little in it these days. but i am discussing £1500 soundbars here not £200-£400 ones or even £500 ones or ones from sonos either as they are extremely overpriced.
my dad owns the £1500 samsung soundbar and it doesn't sound as good as my 5.1 but that's because his living room is 4 times the size of mine. however my mate bought the same one and in a smaller room it competes with my system. i'd say mine is better because of the AVR aspect producing a cleaner sound however there isn't a huge amount in it.
It's not about having rear surrounds. You can have rear surrounds but it doesn't mean all rear surrounds are born equal. The power, the drivers, the bass it can produce, the soundstage, the detail retrieval are all different. The rear surrounds that come with soundbars are trash. The rear surrounds people use in home theatre could be used as their L+R most of the time. My old system I used KEF Q100s for example.
The simple fact is that a wireless speaker will struggle to sound as good as a passive speaker for obvious reasons. the wireless speaker has to compromise on sound quality to be small, portable, wireless etc.
Maybe something is wrong with your setup.. maybe tweak your positioning if a £1500 soundbar is competing or beating your audio setup. A dedicated good 5.1 system will comfortably IMO destroy a soundbar (yes even with wireless rear speakers.. yes even with a wireless subwoofer.. ).
To say there is little in it is... well I think grossly inaccurate. Maybe if your hearing is poor, or you just don't care about audio quality. If all you care about is do I have a bubble of sound around me.. then fine.. put loads of crap speakers around you and bouncing in different directions and with DSP.. u can kind of create that.
If you want crisp dynamic audio with clarity, a huge soundstage, directional audio,... then I think a soundbar will always be comfortably beaten (for obvious reasons.. it has to compromise on all these things for form factor, portability, price, hvaing to power itself).
I understand my current audio setup would be a very unfair comparison.. but even my KEF Q setup was insanely better IMO.
there is only so far you can play with DSP... the law of physics is hard to beat. The size of a soundbar and its rear speakers restricts what it can produce to a fully passive speakers whos only job is to produce sound when it is powered.